General functional arrangement Flashcards
What are 4 functional components which cranial nerves share with spinal nerves?
- somatic efferents
- somatic afferents
- general visceral efferents
- general visceral afferents
What are 3 functional categories contained by cranial nervves in addition to those shared with spinal nerves?
- special visceral efferents (branchiomotor)
- special somatic afferents - special senses, hearing and balance
- special visceral afferents - taste and smell
Identify the origins of the following on the diagram: oculomotor nerve, trochlear nerve, trigeminal nerve, abducents nerve, facial nerve
Identify which is the dorsal and which is the ventral aspect of the brainstem and find the oculomotor nerve origin and the trochlear nerve origin.
What is shown in images C/D?
level of sectioning of the brainstem (superior coliculus) - shows transverse section in D
What is shown in image E?
Diagram of the arrangement of the oculomotor nuclei subserving the various extraocular muscles.
Identify the trochlear, trigeminal and abducens nerves in the photograph.
Note the course of the oculomotor nerve in the diagram.
Identify the origins of the trochlear nerve on the ventral and dorsal diagrams. What is shown in C/D?
level of brainstem - inferior colliculus - affords view seen in D
Identify the course of the trochlear nerve in the image.
What is shown in the diagram?
origin of abducens nerve & cross section at mid-pons level of brainstem
Note the course of the abducens nerve in the diagram from brainstem to orbit.
What is shown in the diagram?
ventral and dorsal views of the brainstem showing origin and course of trigeminal nerve (blue)
What is shown in the image?
level of section in mid pons to illustrate where abducens nerve originates - includes superior and middle cerebral peduncles and upper part of 4th ventricle
