CNS cross section quiz

8/17/2019 CNS cross section quiz

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Neurological Neuroanatomy 177

FIGURE 65: Brainstem Histology — Midbrain (upper — photograph)

Superior colliculus

Aqueduct of midbrain

Periaqueductal gray

Red nucleus

Substantia nigra

Oculomotor nucleus(CN III)

Cerebral peduncle

06 by Taylor & Francis Group, LLC


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FIGURE 65A: Brainstem Histology — Upper Midbrain

Superior colliculus

Brachium of theinferior colliculus

Anterolateral system

Medial lemniscus

Edinger-Westphalnucleus

Oculomotornucleus

Oculomotor nerve (CN III)


Periaqueductal gray

Reticular formation

Red nucleus

Substantia nigra

Parieto-, temporo- andoccipito-pontine fibers

Cortico-spinal tract

Fronto-pontine fibers

MLF



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FIGURE 65B: Brainstem Histology — Lower Midbrain

Brachium of theinferior colliculus

Inferior colliculus

Lateral lemniscus

Mesencephalicnucleus of CN V


Medial lemniscus

Trochlear nucleus

Interpeduncularnucleus


Periaqueductal gray

Reticular formation

MLF

Decussation of the superiorcerebellar peduncles

Substantia nigra


Fronto-pontine fibers

Parieto-, temporo- andoccipito-pontine fibers



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FIGURE 66: Brainstem Histology — Pons (upper — photograph)

Superiormedullary velum

4th ventricle

Superiorcerebellarpeduncle

Locus ceruleus

Medial lemniscus

Pontine nuclei

Middle cerebellarpeduncle

Ponto-cerebellarfibers

Vestibulocochlearnerve (CN VIII)

Cortico-spinalfibers

Ch Ch

Ch = Cerebellar hemisphere



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FIGURE 66A: Brainstem Histology — Upper Pons

Decussation of CN IV

Mesencephalicnucleus of CN V

Lateral lemniscus


Medial lemniscus

Trochlear nerve (CN IV)


Lingula of cerebellum

4th ventricle

Locus ceruleus

Superior cerebellar

peduncle

MLF

Reticular formation

Pontine nuclei



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FIGURE 66B: Brainstem Histology — Mid-Pons

Superior medullary velum

Sensory n. CN V Motor n. CN V

Lateral lemniscus


Medial lemniscus

Trigeminalnerve (CN V)

Cortico-spinal fibers

Lingula of cerebellum

Superior cerebellarpeduncle

4th ventricle

MLF

Reticular formation


Pontine nuclei


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FIGURE 66C: Brainstem Histology — Lower Pons

Nodulus of cerebellum

Vestibular nn.: Medial Superior

Lateral

Spinal t. CN V

Spinal n. CN V

Abducens n.


Medial lemniscus

Trapezoid body

Abducens nerve (CN VI)


Dentate n.

Fastigial n.

Globose n.

Emboliform n.

4th ventricle

Cerebellar peduncles: Inferior

Middle

MLF

Reticular formation

Facial n.

Facial nerve (CN VII)


Superior olivary complex

Pontine nuclei


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FIGURE 67: Brainstem Histology — Medulla (mid — photograph)

Dentate nucleus

Vermis of cerebellum

Tonsil of cerebellum

Foramen of Magendie

Inferior cerebellarpeduncle

Cerebellar cortex

Medial lemniscus

Inferior olivary nucleus

Cortico-spinal tract(pyramid)

Ch = Cerebellar hemisphere

ChCh



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FIGURE 67A: Brainstem Histology — Upper Medulla

Medial vestibular n.

Inferior vestibular n.

Dorsal cochlear n.

Ventral cochlear n.

Spinal t. CN V

Spinal n. CN V


Medial lemniscus



Dentate n.

Vermis of cerebellum

Choroid plexus

4th ventricle


Solitary n.Solitary t.

MLF

Reticular formation

Inferior olivary n.


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FIGURE 67B: Brainstem Histology — Mid-Medulla

Inferior vestibular n.

Accessory cuneate n.

Dorsal motor n.

Hypoglossal n.

Spinal t. CN V

Spinal n. CN V

Vagus nerve(CN X)


Medial lemniscus


Hypoglossal nerve (CN XII)

Choroid plexus

4th ventricle

Solitary n.

Solitary t.


N. ambiguus

MLF

Reticular formation

Inferior olivary n.


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FIGURE 67C: Brainstem Histology – Lower Medulla

Foramen of Magendie

4th ventricle

Area postrema

Accessory cuneate n.

Solitary n.

Solitary t.

MLF

N. ambiguus

Reticular formation

Inferior olivary n.

Gracilis t.

Gracilis n.

Cuneatus t.

Cuneatus n.

Dorsal motor n.

Hypoglossal n.

Spinal t. CN V

Spinal n. CN V

Vagus nerve (CN X)

Internal arcuate fibers


Medial lemniscus


Hypoglossal nerve (CN XII)


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FIGURE 68: Spinal Cord — Nuclei and Tracts

Dorsal horn

Intermediate gray

Ventral horn

Dorsolateral fasciculus(of Lissauer)

Posteromarginal n.

Substantia gelatinosa

Proper sensory n.

Dorsal n. (of Clarke)

Lateral motor n.(to distal muscles)

Medial motor n.(to axial muscles)

Lateralcortico-spinal t.

Rubro-spinal t.

MLF

Lateral (medullary)reticulo-spinal t.

Medial (pontine)reticulo-spinal t.

Lateral vestibulo-spinal t.

Anterior cortico-spinal t.

Fasciculus gracilis

Fasciculus cuneatus

Dorsolateral fasciculus(of Lissauer)

Dorsalspino-cerebellar t.

Ventralspino-cerebellar t.

Lateralspino-thalamic t.

Anteriorspino-thalamic t.



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FIGURE 69: Spinal Cord Histology — Cross-Sections

Dorsal horn

Intermediate gray

Ventral horn

Dorsal horn

Intermediate gray

Ventral horn

Dorsal horn

Intermediate gray

Ventral horn

Dorsal column:

Fasciculus gracilis

Fasciculus cuneatus

Ventral whitecommissure

Ventral medianfissure

Arachnoid

Pia

Cervical

Lateral horn

Subarachnoidspace

Dura

Dorsal roots

Substantiagelatinosa

Central canal

Ventral roots

Toracic

Lumbar

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