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Introduction to Neruo-Anatomy 1 47 Minutes Introduction to Neruo-Anatomy 2 34 Minutes Meninges 1 55 Minutes Meninges 2 37 Minutes C.S.F & Ventricular System 1 61 Minutes C.S.F & Ventricular System 2 55 Minutes C.S.F & Ventricular System 3 18 Minutes C.S.F & Ventricular System 4 43 Minutes C.S.F & Ventricular System 5 32 Minutes Development of Nervous System 1 60 Minutes Development of Nervous System 2 52 Minutes Autonomic Nervous System 1 62 Minutes Autonomic Nervous System 2 43 Minutes Autonomic Nervous System 3 56 Minutes Autonomic Nervous System 4 40 Minutes Autonomic Nervous System 5 57 Minutes Autonomic Nervous System 6 46 Minutes Autonomic Nervous System 7 60 Minutes Sensory System & Ascending Tracts 1 58 Minutes Sensory System & Ascending Tracts 2 38 Minutes Sensory System & Ascending Tracts 3 57 Minutes Sensory System & Ascending Tracts 4 41 Minutes Motor System & Descending Tracts 1 40 Minutes Motor System & Descending Tracts 2 54 Minutes Motor System & Descending Tracts 3 65 Minutes DR NAJEEB LECTURES Your Personal Concept Library Upper & Lower Motor Neurons & Their Lesions 1 60 Minutes Upper & Lower Motor Neurons & Their Lesions 2 60 Minutes Upper & Lower Motor Neurons & Their Give me 120 mcqs on these topic

Reading File
Here are 120 MCQs covering all the topics from your Dr. Najeeb Neuro-Anatomy lecture series:

120 MCQs - Neuro-Anatomy (Dr. Najeeb Series)

SECTION 1: Introduction to Neuro-Anatomy (Q1-10)

1. The nervous system is divided into:
  • A) Central and Autonomic
  • B) Central and Peripheral
  • C) Somatic and Visceral
  • D) Sensory and Motor
Answer: B - Central Nervous System (brain + spinal cord) and Peripheral Nervous System.
2. The basic structural and functional unit of the nervous system is the:
  • A) Neuroglia
  • B) Synapse
  • C) Neuron
  • D) Axon
Answer: C
3. Which type of neuron has ONE axon and ONE dendrite?
  • A) Unipolar
  • B) Bipolar
  • C) Multipolar
  • D) Pseudounipolar
Answer: B - Bipolar neurons (e.g., retinal cells, cochlear ganglion).
4. Nissl bodies in neurons represent:
  • A) Mitochondria
  • B) Rough endoplasmic reticulum
  • C) Golgi apparatus
  • D) Lysosomes
Answer: B - Nissl bodies = rough ER + free ribosomes; they are absent in the axon hillock.
5. Which of the following is NOT a function of neuroglia?
  • A) Myelination
  • B) Phagocytosis
  • C) Transmission of action potential
  • D) Support and insulation
Answer: C - Action potential transmission is exclusively a neuronal function.
6. Myelin in the CNS is produced by:
  • A) Schwann cells
  • B) Astrocytes
  • C) Oligodendrocytes
  • D) Microglia
Answer: C
7. Myelin in the PNS is produced by:
  • A) Oligodendrocytes
  • B) Schwann cells
  • C) Microglia
  • D) Ependymal cells
Answer: B
8. The nodes of Ranvier allow:
  • A) Continuous conduction
  • B) Saltatory conduction
  • C) Retrograde axonal transport
  • D) Synaptic transmission
Answer: B
9. Gray matter of the spinal cord contains:
  • A) Myelinated axons only
  • B) Cell bodies, dendrites, and unmyelinated axons
  • C) Only white matter tracts
  • D) Ependymal cells exclusively
Answer: B
10. White matter of the CNS primarily consists of:
  • A) Neuronal cell bodies
  • B) Myelinated axons
  • C) Unmyelinated axons
  • D) Glial cell bodies
Answer: B

SECTION 2: Meninges (Q11-22)

11. The outermost layer of the meninges is the:
  • A) Pia mater
  • B) Arachnoid mater
  • C) Dura mater
  • D) Periosteum
Answer: C
12. The dura mater of the brain has how many layers?
  • A) One
  • B) Two (periosteal and meningeal)
  • C) Three
  • D) Four
Answer: B - The two layers are the periosteal (outer) and meningeal (inner) layers.
13. The falx cerebri is a fold of:
  • A) Pia mater
  • B) Arachnoid mater
  • C) Dura mater (meningeal layer)
  • D) Periosteum
Answer: C
14. The tentorium cerebelli separates:
  • A) Two cerebral hemispheres
  • B) Cerebrum from cerebellum
  • C) Frontal from temporal lobe
  • D) Cerebellum from brainstem
Answer: B
15. The subarachnoid space contains:
  • A) Blood
  • B) Cerebrospinal fluid
  • C) Lymph
  • D) Interstitial fluid
Answer: B
16. An extradural (epidural) hematoma results from rupture of the:
  • A) Bridging veins
  • B) Middle meningeal artery
  • C) Superior sagittal sinus
  • D) Basilar artery
Answer: B
17. A subdural hematoma results from rupture of:
  • A) Middle meningeal artery
  • B) Bridging veins between cortex and dural sinuses
  • C) Vertebral artery
  • D) Anterior cerebral artery
Answer: B
18. The arachnoid granulations (Pacchionian bodies) drain CSF into the:
  • A) Lateral ventricles
  • B) Subarachnoid space
  • C) Dural venous sinuses
  • D) Choroid plexus
Answer: C - CSF drains via arachnoid granulations into dural venous sinuses (mainly superior sagittal sinus).
19. The diaphragma sellae is a dural fold that covers the:
  • A) Corpus callosum
  • B) Pituitary fossa
  • C) Pineal gland
  • D) Fourth ventricle
Answer: B
20. The space between the dura mater and the arachnoid is called:
  • A) Epidural space
  • B) Subarachnoid space
  • C) Subdural space
  • D) Perivascular space
Answer: C
21. The pia mater is described as:
  • A) Thick and fibrous
  • B) Highly vascular and closely adherent to brain surface
  • C) Avascular and loosely attached
  • D) Continuous with periosteum of skull
Answer: B
22. In bacterial meningitis, which meningeal layer is most commonly infected?
  • A) Dura mater
  • B) Pia-arachnoid (leptomeninges)
  • C) Epidural space
  • D) Periosteum
Answer: B

SECTION 3: CSF & Ventricular System (Q23-42)

23. CSF is primarily produced by the:
  • A) Ependymal cells
  • B) Choroid plexus
  • C) Arachnoid granulations
  • D) Astrocytes
Answer: B
24. The total volume of CSF in an adult is approximately:
  • A) 50 mL
  • B) 100 mL
  • C) 150 mL
  • D) 250 mL
Answer: C - ~150 mL (75 mL intracranial, 75 mL spinal).
25. Normal CSF pressure in a recumbent adult is:
  • A) 5-10 mmHg
  • B) 10-20 mmHg (70-180 mmH2O)
  • C) 20-30 mmHg
  • D) 30-40 mmHg
Answer: B
26. The lateral ventricles communicate with the third ventricle through the:
  • A) Cerebral aqueduct (of Sylvius)
  • B) Foramina of Luschka
  • C) Foramen of Magendie
  • D) Interventricular foramen (of Monro)
Answer: D
27. The third ventricle communicates with the fourth ventricle through the:
  • A) Foramen of Monro
  • B) Cerebral aqueduct (of Sylvius)
  • C) Foramen of Magendie
  • D) Foramina of Luschka
Answer: B
28. CSF exits the fourth ventricle into the subarachnoid space through:
  • A) Foramen of Monro only
  • B) Foramina of Luschka (lateral) and Magendie (median)
  • C) Cerebral aqueduct only
  • D) Central canal of spinal cord only
Answer: B
29. Normal CSF protein content is:
  • A) 5-15 mg/dL
  • B) 15-45 mg/dL
  • C) 50-100 mg/dL
  • D) 100-200 mg/dL
Answer: B
30. Normal CSF glucose is approximately what percentage of blood glucose?
  • A) 25%
  • B) 50-70%
  • C) 80-90%
  • D) 100%
Answer: B
31. Communicating hydrocephalus is caused by:
  • A) Obstruction within the ventricular system
  • B) Impaired absorption at arachnoid granulations
  • C) Overproduction of CSF only
  • D) Aqueductal stenosis
Answer: B
32. Non-communicating (obstructive) hydrocephalus is most commonly caused by:
  • A) Meningitis
  • B) Aqueductal stenosis
  • C) Choroid plexus papilloma
  • D) Subarachnoid hemorrhage
Answer: B
33. The choroid plexus is absent in which ventricle?
  • A) Lateral ventricle
  • B) Third ventricle
  • C) Cerebral aqueduct
  • D) Fourth ventricle
Answer: C - The cerebral aqueduct has no choroid plexus.
34. Normal CSF cell count is:
  • A) 0-5 lymphocytes/mm³
  • B) 10-20 cells/mm³
  • C) 50-100 cells/mm³
  • D) 100-500 cells/mm³
Answer: A
35. In tuberculous meningitis, CSF typically shows:
  • A) High glucose, low protein, neutrophils
  • B) Low glucose, high protein, lymphocytes
  • C) Normal glucose, low protein, eosinophils
  • D) High glucose, normal protein, RBCs
Answer: B
36. The blood-brain barrier is formed by:
  • A) Microglia tight junctions
  • B) Tight junctions between brain capillary endothelial cells + astrocyte foot processes
  • C) Pia mater
  • D) Choroid plexus epithelium
Answer: B
37. Normal-pressure hydrocephalus (NPH) triad includes all EXCEPT:
  • A) Dementia
  • B) Gait ataxia
  • C) Urinary incontinence
  • D) Papilledema
Answer: D - NPH triad = "Wet, Wacky, Wobbly" (incontinence, dementia, gait). Papilledema is NOT present.
38. The roof of the fourth ventricle is formed by:
  • A) Pons
  • B) Superior and inferior medullary vela
  • C) Cerebral peduncles
  • D) Thalamus
Answer: B
39. The lateral apertures of the fourth ventricle are called:
  • A) Foramina of Magendie
  • B) Foramina of Luschka
  • C) Foramina of Monro
  • D) Cerebral aqueduct
Answer: B
40. Xanthochromia in CSF indicates:
  • A) Bacterial meningitis
  • B) Previous subarachnoid hemorrhage (breakdown of RBCs)
  • C) Viral meningitis
  • D) Normal finding
Answer: B
41. Which ventricle is a midline structure located between the two thalami?
  • A) Lateral ventricle
  • B) Third ventricle
  • C) Fourth ventricle
  • D) Central canal
Answer: B
42. The rate of CSF production is approximately:
  • A) 50 mL/day
  • B) 100 mL/day
  • C) 500 mL/day
  • D) 1000 mL/day
Answer: C - ~500 mL/day, with total volume replaced ~3-4 times daily.

SECTION 4: Development of the Nervous System (Q43-54)

43. The nervous system develops from which embryonic layer?
  • A) Mesoderm
  • B) Endoderm
  • C) Ectoderm (neural plate)
  • D) Lateral plate mesoderm
Answer: C
44. Neural tube closure normally occurs at which week of gestation?
  • A) Week 2
  • B) Week 3-4
  • C) Week 6-7
  • D) Week 10
Answer: B - Neural tube closes by day 25-28 (end of week 4).
45. Failure of the neural tube to close at the rostral (cranial) end results in:
  • A) Spina bifida
  • B) Anencephaly
  • C) Meningomyelocele
  • D) Syringomyelia
Answer: B
46. Failure of the neural tube to close at the caudal end results in:
  • A) Anencephaly
  • B) Arnold-Chiari malformation
  • C) Spina bifida (lumbosacral region)
  • D) Dandy-Walker malformation
Answer: C
47. Neural crest cells give rise to all of the following EXCEPT:
  • A) Dorsal root ganglion neurons
  • B) Schwann cells
  • C) Oligodendrocytes
  • D) Melanocytes
Answer: C - Oligodendrocytes arise from the neural tube, NOT neural crest cells.
48. The three primary brain vesicles are:
  • A) Telencephalon, diencephalon, mesencephalon
  • B) Prosencephalon, mesencephalon, rhombencephalon
  • C) Cerebrum, cerebellum, brainstem
  • D) Forebrain, midbrain, hindbrain (same as A and D are equal)
Answer: B - Prosencephalon (forebrain), mesencephalon (midbrain), rhombencephalon (hindbrain).
49. The telencephalon develops into:
  • A) Thalamus and hypothalamus
  • B) Cerebral cortex, basal ganglia, and hippocampus
  • C) Pons and cerebellum
  • D) Medulla oblongata
Answer: B
50. The diencephalon develops into:
  • A) Cerebral cortex
  • B) Thalamus, hypothalamus, epithalamus, subthalamus
  • C) Cerebellum
  • D) Pons
Answer: B
51. Folic acid supplementation reduces the risk of:
  • A) Anencephaly and spina bifida
  • B) Down syndrome
  • C) Hydrocephalus
  • D) Dandy-Walker malformation
Answer: A
52. The myelencephalon develops into:
  • A) Pons
  • B) Cerebellum
  • C) Medulla oblongata
  • D) Midbrain
Answer: C
53. Dandy-Walker malformation involves:
  • A) Failure of rostral neuropore closure
  • B) Cystic dilation of fourth ventricle + cerebellar vermis hypoplasia
  • C) Herniation of cerebellar tonsils through foramen magnum
  • D) Corpus callosum agenesis
Answer: B
54. The neural plate is induced by the:
  • A) Surface ectoderm
  • B) Notochord (axial mesoderm)
  • C) Endoderm
  • D) Lateral plate mesoderm
Answer: B

SECTION 5: Autonomic Nervous System (Q55-76)

55. The autonomic nervous system is divided into:
  • A) Somatic and visceral
  • B) Sympathetic, parasympathetic, and enteric
  • C) Afferent and efferent
  • D) Central and peripheral
Answer: B
56. The preganglionic fiber of the sympathetic system originates from:
  • A) Craniosacral outflow
  • B) Thoracolumbar outflow (T1-L2)
  • C) Sacral outflow (S2-S4)
  • D) Cranial nerves III, VII, IX, X
Answer: B
57. Sympathetic preganglionic fibers synapse in:
  • A) Terminal ganglia near target organs
  • B) Paravertebral (sympathetic chain) or prevertebral ganglia
  • C) Ciliary ganglion
  • D) Pterygopalatine ganglion
Answer: B
58. Parasympathetic preganglionic fibers are:
  • A) Short, with long postganglionic fibers
  • B) Long, with short postganglionic fibers
  • C) Equal length to postganglionic fibers
  • D) Absent in cranial nerves
Answer: B
59. The neurotransmitter at ALL autonomic ganglia (both sympathetic and parasympathetic) is:
  • A) Norepinephrine
  • B) Acetylcholine (acting on nicotinic receptors)
  • C) Dopamine
  • D) Serotonin
Answer: B
60. The neurotransmitter at sympathetic postganglionic terminals (most) is:
  • A) Acetylcholine
  • B) Norepinephrine
  • C) Dopamine
  • D) Epinephrine
Answer: B - Exception: sympathetic supply to sweat glands and some blood vessels uses ACh.
61. The neurotransmitter at parasympathetic postganglionic terminals is:
  • A) Norepinephrine
  • B) Dopamine
  • C) Acetylcholine (acting on muscarinic receptors)
  • D) Serotonin
Answer: C
62. The "fight or flight" response is mediated by:
  • A) Parasympathetic system
  • B) Sympathetic system
  • C) Enteric nervous system
  • D) Somatic nervous system
Answer: B
63. Horner's syndrome results from interruption of which pathway?
  • A) Parasympathetic supply to the eye
  • B) Sympathetic supply to the face/eye
  • C) CN III
  • D) CN VII
Answer: B - Horner's = ptosis, miosis, anhidrosis.
64. The ciliary ganglion carries parasympathetic fibers from which cranial nerve?
  • A) CN II
  • B) CN III (oculomotor)
  • C) CN V
  • D) CN VII
Answer: B
65. The pterygopalatine ganglion carries parasympathetic fibers from:
  • A) CN III
  • B) CN VII (via greater petrosal nerve)
  • C) CN IX
  • D) CN X
Answer: B
66. The otic ganglion carries parasympathetic fibers from:
  • A) CN VII
  • B) CN IX (glossopharyngeal)
  • C) CN X
  • D) CN III
Answer: B
67. The submandibular ganglion carries parasympathetic fibers from:
  • A) CN IX
  • B) CN VII (via chorda tympani)
  • C) CN X
  • D) CN III
Answer: B
68. Alpha-1 adrenergic receptor stimulation causes:
  • A) Vasodilation
  • B) Vasoconstriction and mydriasis
  • C) Bradycardia
  • D) Bronchodilation
Answer: B
69. Beta-1 adrenergic receptor stimulation causes:
  • A) Bronchoconstriction
  • B) Increased heart rate and contractility
  • C) Vasodilation
  • D) Decreased renin secretion
Answer: B
70. Beta-2 adrenergic receptor stimulation causes:
  • A) Vasoconstriction
  • B) Bronchodilation and vasodilation
  • C) Bradycardia
  • D) Pupil constriction
Answer: B
71. The adrenal medulla is a modified:
  • A) Parasympathetic ganglion
  • B) Sympathetic ganglion (secretes epinephrine/norepinephrine directly)
  • C) Somatic motor nucleus
  • D) Enteric ganglion
Answer: B
72. Parasympathetic stimulation of the heart causes:
  • A) Increased heart rate via beta-1 receptors
  • B) Decreased heart rate via M2 muscarinic receptors (vagal tone)
  • C) Increased contractility
  • D) Coronary vasodilation
Answer: B
73. The enteric nervous system is also called:
  • A) Second brain
  • B) Third division of ANS
  • C) Somatic gut innervation
  • D) Pelvic splanchnic nerves
Answer: A - The "second brain" - Auerbach's (myenteric) and Meissner's (submucosal) plexuses.
74. Detrusor muscle contraction (micturition) is mediated by:
  • A) Sympathetic (T11-L2) via beta-3 receptors
  • B) Parasympathetic (S2-S4) via M3 muscarinic receptors
  • C) Somatic (pudendal nerve)
  • D) Sympathetic via alpha-1 receptors
Answer: B
75. The greater splanchnic nerve arises from:
  • A) T1-T4
  • B) T5-T9
  • C) T10-T12
  • D) L1-L2
Answer: B
76. Which of the following is a parasympathetic effect?
  • A) Mydriasis
  • B) Miosis (pupil constriction)
  • C) Tachycardia
  • D) Bronchodilation
Answer: B

SECTION 6: Sensory System & Ascending Tracts (Q77-96)

77. Pain and temperature from the body are carried in the:
  • A) Dorsal column - medial lemniscal pathway
  • B) Spinothalamic tract (anterolateral system)
  • C) Spinocerebellar tract
  • D) Corticospinal tract
Answer: B
78. Fine touch, vibration, and proprioception from the body are carried in the:
  • A) Lateral spinothalamic tract
  • B) Dorsal column - medial lemniscal pathway
  • C) Anterior spinothalamic tract
  • D) Spinoreticular tract
Answer: B
79. First-order neurons of the dorsal column pathway synapse in the:
  • A) Dorsal horn of spinal cord
  • B) Nucleus gracilis or nucleus cuneatus (medulla)
  • C) Thalamus
  • D) Somatosensory cortex
Answer: B
80. The dorsal column carries information from the ipsilateral side. Decussation (crossing) occurs at:
  • A) Spinal cord level of entry
  • B) Medulla (internal arcuate fibers)
  • C) Midbrain
  • D) Thalamus
Answer: B
81. The spinothalamic tract crosses the midline at:
  • A) Medulla
  • B) Within 1-2 spinal cord segments of entry (via anterior white commissure)
  • C) Midbrain
  • D) Thalamus
Answer: B
82. Second-order neurons of the spinothalamic tract project to the:
  • A) Nucleus gracilis
  • B) Ventral posterolateral (VPL) nucleus of thalamus
  • C) Somatosensory cortex directly
  • D) Cerebellum
Answer: B
83. Pain and temperature from the FACE are carried by:
  • A) Medial lemniscus
  • B) Trigeminal nerve (CN V) - spinal nucleus
  • C) Glossopharyngeal nerve
  • D) Facial nerve
Answer: B
84. Fine touch from the face synapses in which nucleus?
  • A) Spinal nucleus of CN V
  • B) Principal (main) sensory nucleus of CN V
  • C) Motor nucleus of CN V
  • D) Mesencephalic nucleus of CN V
Answer: B
85. Proprioception from the face (jaw muscles) is processed in:
  • A) VPL nucleus
  • B) Mesencephalic nucleus of CN V
  • C) Spinal nucleus of CN V
  • D) Principal sensory nucleus of CN V
Answer: B
86. Syringomyelia classically presents with:
  • A) Loss of fine touch and proprioception
  • B) Bilateral loss of pain and temperature at the affected segments (cape distribution)
  • C) Complete motor loss
  • D) Loss of vibration sense only
Answer: B - Central canal expansion destroys decussating spinothalamic fibers.
87. The posterior column carries fibers organized as:
  • A) Sacral fibers most medial
  • B) Sacral fibers most medial (gracile fasciculus), cervical most lateral (cuneate fasciculus)
  • C) Cervical fibers most medial
  • D) No somatotopic organization
Answer: B
88. The VPL nucleus of thalamus relays sensory information from:
  • A) Face
  • B) Body (contralateral)
  • C) Auditory system
  • D) Visual system
Answer: B
89. The VPM nucleus of thalamus relays sensory information from:
  • A) Body
  • B) Face (via trigeminal pathways)
  • C) Auditory system
  • D) Cerebellum
Answer: B
90. The spinocerebellar tracts transmit:
  • A) Conscious pain to thalamus
  • B) Unconscious proprioception to cerebellum
  • C) Fine touch to cortex
  • D) Motor commands to spinal cord
Answer: B
91. Brown-Séquard syndrome (hemisection of spinal cord) causes:
  • A) Bilateral loss of all modalities
  • B) Ipsilateral loss of fine touch/proprioception + contralateral loss of pain/temperature
  • C) Contralateral loss of all modalities
  • D) Only motor loss
Answer: B
92. Gate control theory of pain was proposed by:
  • A) Sherrington and Golgi
  • B) Melzack and Wall
  • C) Cajal and Golgi
  • D) Adrian and Sherrington
Answer: B
93. Referred pain is due to:
  • A) Direct injury to somatic nerves
  • B) Convergence of visceral and somatic afferents on the same dorsal horn neurons
  • C) Autonomic reflex arcs
  • D) Cortical misinterpretation
Answer: B
94. A lesion of the dorsal columns causes loss of all EXCEPT:
  • A) Vibration sense
  • B) Pain and temperature (these are preserved - carried by spinothalamic tract)
  • C) Proprioception
  • D) Two-point discrimination
Answer: B
95. Tabes dorsalis (syphilis) affects the:
  • A) Anterior horn cells
  • B) Posterior (dorsal) columns - causing loss of proprioception and vibration
  • C) Lateral columns
  • D) Anterior white commissure
Answer: B
96. The somatosensory cortex (postcentral gyrus) is located in the:
  • A) Frontal lobe
  • B) Parietal lobe (Brodmann areas 1, 2, 3)
  • C) Temporal lobe
  • D) Occipital lobe
Answer: B

SECTION 7: Motor System & Descending Tracts (Q97-108)

97. The primary motor cortex (area 4) is located in the:
  • A) Postcentral gyrus
  • B) Precentral gyrus (frontal lobe)
  • C) Temporal lobe
  • D) Parietal lobe
Answer: B
98. The lateral corticospinal tract decussates at the:
  • A) Internal capsule
  • B) Pyramidal decussation (lower medulla)
  • C) Cervical spinal cord
  • D) Midbrain
Answer: B
99. Upper motor neuron (UMN) lesion signs include all EXCEPT:
  • A) Spasticity
  • B) Hyperreflexia
  • C) Muscle atrophy (this is an LMN sign - UMN shows mild disuse atrophy only)
  • D) Positive Babinski sign
Answer: C - Significant muscle atrophy with fasciculations is an LMN sign.
100. Lower motor neuron (LMN) lesion signs include all EXCEPT:
  • A) Flaccidity
  • B) Hyporeflexia
  • C) Positive Babinski sign (this is a UMN sign)
  • D) Fasciculations
Answer: C
101. The Babinski sign (extensor plantar response) indicates a lesion in the:
  • A) Lower motor neuron
  • B) Upper motor neuron (corticospinal tract)
  • C) Cerebellum
  • D) Basal ganglia
Answer: B
102. The corticobulbar tract controls:
  • A) Limb muscles
  • B) Cranial nerve motor nuclei (face, tongue, throat muscles)
  • C) Trunk muscles
  • D) Respiratory muscles only
Answer: B
103. In a pure UMN lesion to the facial nerve (supranuclear), which finding is expected?
  • A) Complete facial paralysis including forehead
  • B) Lower face weakness with sparing of the forehead (bilateral cortical representation)
  • C) Loss of taste
  • D) Hyperacusis
Answer: B
104. The anterior corticospinal tract:
  • A) Decussates in the medulla
  • B) Descends ipsilaterally, decussating at spinal cord level (controls axial muscles)
  • C) Controls distal limb muscles only
  • D) Is the largest component of the pyramidal system
Answer: B
105. The rubrospinal tract originates from:
  • A) Vestibular nuclei
  • B) Red nucleus (midbrain)
  • C) Reticular formation
  • D) Cerebellum
Answer: B
106. The vestibulospinal tract primarily controls:
  • A) Fine finger movements
  • B) Postural tone and balance (extensor muscles)
  • C) Facial muscles
  • D) Visceral motor activity
Answer: B
107. The reticulospinal tract functions in:
  • A) Voluntary fine movement
  • B) Regulation of muscle tone, posture, and autonomic functions
  • C) Proprioception
  • D) Pain modulation only
Answer: B
108. Decerebrate posturing (extension of all four limbs) results from a lesion:
  • A) Above the red nucleus (midbrain)
  • B) Between the red nucleus and vestibular nucleus (midbrain-pontine level)
  • C) At medullary level
  • D) At spinal cord level
Answer: B

SECTION 8: Upper & Lower Motor Neurons & Their Lesions (Q109-120)

109. Amyotrophic lateral sclerosis (ALS) affects:
  • A) Only UMN
  • B) Only LMN
  • C) Both UMN and LMN (combined UMN + LMN signs)
  • D) Sensory neurons primarily
Answer: C
110. Which reflex arc involves only LMN and is monosynaptic?
  • A) Flexor withdrawal reflex
  • B) Deep tendon reflex (stretch reflex)
  • C) Cremasteric reflex
  • D) Abdominal reflex
Answer: B
111. Wasting and fasciculations of the tongue indicate a lesion of:
  • A) Corticobulbar tract (UMN)
  • B) Hypoglossal nucleus or nerve (LMN - CN XII)
  • C) Cerebellum
  • D) Thalamus
Answer: B
112. In spinal shock (immediately after complete spinal cord injury), the reflexes below the lesion are:
  • A) Exaggerated
  • B) Absent (areflexia) - flaccid paralysis
  • C) Clonus present
  • D) Babinski positive immediately
Answer: B - Spinal shock is a temporary state; UMN signs appear later.
113. Clonus is a sign of:
  • A) LMN lesion
  • B) UMN lesion (hyperreflexia with sustained rhythmic contractions)
  • C) Cerebellar lesion
  • D) Peripheral neuropathy
Answer: B
114. The anterior horn cell of the spinal cord is the:
  • A) Upper motor neuron
  • B) Lower motor neuron (final common pathway)
  • C) First-order sensory neuron
  • D) Preganglionic autonomic neuron
Answer: B
115. Poliomyelitis selectively destroys:
  • A) Dorsal horn neurons
  • B) Anterior horn cells (LMN) - causing flaccid paralysis
  • C) Corticospinal tract
  • D) Dorsal column neurons
Answer: B
116. Hyperreflexia, spasticity, and positive Babinski are signs of:
  • A) LMN lesion
  • B) UMN lesion
  • C) Cerebellar lesion
  • D) Basal ganglia lesion
Answer: B
117. Which of the following is characteristic of a cerebellar lesion (NOT UMN/LMN)?
  • A) Spasticity
  • B) Intention tremor and past-pointing (dysmetria)
  • C) Fasciculations
  • D) Positive Babinski
Answer: B
118. The "final common pathway" for all motor activity is the:
  • A) Upper motor neuron
  • B) Lower motor neuron (alpha motor neuron)
  • C) Corticospinal tract
  • D) Red nucleus
Answer: B
119. A patient presents with weakness, wasting, fasciculations, and absent reflexes in the upper limb, but spasticity and hyperreflexia in the lower limbs. This pattern suggests:
  • A) Pure UMN lesion
  • B) Mixed UMN + LMN lesion (e.g., ALS or cervical myelopathy with radiculopathy)
  • C) Pure LMN lesion
  • D) Cerebellar lesion
Answer: B
120. Klumpke's paralysis involves injury to which nerve roots?
  • A) C5-C6 (Erb's palsy)
  • B) C8-T1 (lower brachial plexus - intrinsic hand muscles + Horner's syndrome)
  • C) L4-L5
  • D) S1-S2
Answer: B

Quick Reference Summary

TopicKey MCQs
Intro Neuro-AnatomyQ1-10
MeningesQ11-22
CSF & Ventricular SystemQ23-42
Development of NSQ43-54
Autonomic NSQ55-76
Sensory System & Ascending TractsQ77-96
Motor System & Descending TractsQ97-108
UMN & LMN LesionsQ109-120
These 120 MCQs cover all the major concepts from Dr. Najeeb's neuro-anatomy lecture series. Each question targets a high-yield concept with a clear explanation for the correct answer. Good luck with your studies!
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