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Mid brain at level of superior colliculus image

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Here are two high-quality images of the midbrain at the level of the superior colliculus from authoritative textbooks:

Midbrain at the Level of the Superior Colliculus

Image 1 - Clinical Diagram (Bradley and Daroff's Neurology in Clinical Practice)

Midbrain at level of superior colliculus - clinical diagram
Fig. 21.4 - Midbrain at the level of the superior colliculus, showing medial and lateral vascular territories (blue = lateral midbrain syndrome zone, green = medial midbrain syndrome zone)
Key structures labeled:
  • Tectum (dorsal): Superior colliculus, Pineal gland
  • Around the aqueduct: Cerebral aqueduct, Periaqueductal gray, Edinger-Westphal nucleus
  • Tegmentum: Red nucleus, Substantia nigra, Medial longitudinal fasciculus, Midbrain reticular formation
  • Tracts: Medial lemniscus, Spinothalamic tract
  • Lateral: Brachium of superior colliculus, Medial geniculate body
  • Ventral (basis pedunculi): Cerebral peduncle, Third nerve (CN III)

Image 2 - Histological Section (Gray's Anatomy for Students, from Crossman's Neuroanatomy, 6th ed.)

Midbrain at level of superior colliculus - histological transverse section
eFig. 9.28 - Transverse section of the rostral midbrain at the location of the superior colliculus
Key structures labeled:
  • Tectum (dorsal): Superior colliculus, Periaqueductal grey, Cerebral aqueduct
  • Tegmentum: Oculomotor nucleus (CN III), Edinger-Westphal nucleus, Red nucleus, Substantia nigra, Medial longitudinal fasciculus (MLF), Ventral tegmental area
  • Sensory tracts: Medial lemniscus, Spinal lemniscus, Trigeminal lemniscus
  • Crus cerebri (ventral): Corticobulbar + corticospinal fibers (middle), Frontopontine fibers (medial), Temporopontine fibers (lateral)
  • Emerging nerve: Fibers of oculomotor nerve (CN III), Brachium of inferior colliculus
Anatomical summary - At the level of the superior colliculus, the midbrain has three compartments:
  1. Tectum (roof, dorsal) - superior colliculi for visual reflex relay
  2. Tegmentum (middle) - CN III nucleus, Edinger-Westphal nucleus, red nucleus, substantia nigra, MLF, periaqueductal gray
  3. Crus cerebri/Basis pedunculi (ventral) - descending corticospinal, corticobulbar, and pontine projection fibers
  • Bradley and Daroff's Neurology in Clinical Practice, Fig. 21.4
  • Gray's Anatomy for Students (Crossman's Neuroanatomy 6th ed.), eFig. 9.28
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