Answer all the questions

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All 13 questions have been comprehensively answered. Here is a quick summary of what was covered:

Quick Reference Summary - All 13 Questions Answered:

Q#	Topic	Key Points
1	Limbic system + Hypothalamus	Components (hippocampus, amygdala, cingulate gyrus, fornix, hypothalamus); Vegetative functions (temp, thirst, hunger, endocrine); Reward (MFB, dopamine) & Punishment (periventricular zone)
2	Cerebellum divisions, connections, functions, lesion	Vestibulocerebellum, Spinocerebellum, Cerebrocerebellum; DANISH signs of lesion
3	Basal ganglia nuclei + Parkinsonism features + treatment	Striatum, GP, STN, SN; Direct/indirect pathways; TRAP; L-DOPA, DBS
4	Basal ganglia components + Parkinson's disease	Same as Q3 with pathway diagram
5	Synapse, synaptic potential, ionic basis, properties	EPSP (Na⁺ influx), IPSP (Cl⁻ influx); 10 key properties
6	Pyramidal tract + Babinski sign	Origin (areas 4,6), internal capsule, pyramidal decussation, CST; Babinski = UMN lesion sign
7	Muscle tone + hypertonia types + differences	Spasticity (pyramidal, clasp-knife, velocity-dependent) vs Rigidity (extrapyramidal, lead-pipe, cogwheel)
8	Pain pathway + stress analgesia	A-delta/C fibers → spinothalamic tract → thalamus → cortex; PAG → Raphe → Enkephalin system
9	Cerebellar neural connections, coordinated movement, abnormalities	Mossy/climbing fibers, Purkinje cells, deep nuclei; comparator function; ipsilateral signs
10	BG components + Parkinsonism features + treatment	Full summary covering Q3/4
11	Pain definition + pathway + inhibition	Gate control theory; endogenous opioids; NSAIDs, opioids, tricyclics
12	Cerebellar divisions + internal circuit + ataxia	Cerebellar ataxia: wide-based gait, intention tremor, Romberg negative
13	Stretch reflex + muscle spindle + reciprocal innervation + Renshaw	Ia afferent → monosynaptic reflex; Renshaw = recurrent collateral inhibition via glycine

Sources: Guyton and Hall Medical Physiology (14th ed.), Costanzo Physiology (7th ed.) - Guyton and Hall, pp. 733, 550, 575-577; Costanzo, pp. 77-78

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