OCB03-2006 Part A.pdf

06/12/2020 NEUROANATOMY PRACTICAL II Brainstem & Cranial Nerves BDS 2 Part A: Cranial nerves (Allow 40 mins) 1 1 06/12/2020 NEUROANATOMY PRACTICAL II Brainstem and Cranial Nerves Part A: QUESTIONS 2 2 06/12/2020 Cranial nerves 1 On the right is the ventral surface of the brain 1. Which cranial nerve...

06/12/2020 NEUROANATOMY PRACTICAL II Brainstem & Cranial Nerves BDS 2 Part A: Cranial nerves (Allow 40 mins) 1 1 06/12/2020 NEUROANATOMY PRACTICAL II Brainstem and Cranial Nerves Part A: QUESTIONS 2 2 06/12/2020 Cranial nerves 1 On the right is the ventral surface of the brain 1. Which cranial nerves are associated with movement of the eyeball? Identify them in Fig 1 2. How many cranial nerves are associated with “special senses” (as opposed to somato-sensation or visceral sensation)? Which are they and how many can you identify in Fig 1? 3. Two cranial nerves have their cell bodies outside of the cranial vault. Which are they and are both visible in Fig 1? Ventral view 3 3 06/12/2020 Cranial nerves 1 4. Identify the following cranial nerves: C.II – C.VIII, C.XII 5. You should also review the function of these nerves (and the cranial nerves not visible) and therefore be able to say whether each is afferent, efferent or both. 6. C.IX – C.XI appear as a series of rootlets. Although you cannot easily say which rootlets are part of which nerve, you should be able to identify their approximate location. Which nerve will be formed by the most rostral rootlets? Which by the most caudal ones? Ventral view 4 4 06/12/2020 NEUROANATOMY PRACTICAL III Brainstem and Cranial Nerves Part A: ANSWERS 5 5 06/12/2020 Cranial nerves 1 On the right is the ventral surface of the brain 1. Which cranial nerves are associated with movement of the eyeball? Identify them in Fig 1 C.III (Oculomotor), C.IV (Trochlear) C.VI (Abducens) 2. How many cranial nerves are associated with “special senses” (as opposed to somatosensation or visceral sensation)? Which are they and how many can you identify in Fig 1? 5; C.I (Olfaction), C.II (Vision), C.VII (Taste), C.VIII (Hearing and Balance), C.IX (Taste) 3. Two cranial nerves have their cell bodies outside of the cranial vault. Which are they and are both visible in Fig 1? C.I (olfactory) – not visible C.II (optic) - visible Ventral view 6 6 06/12/2020 Cranial nerves 1 4. Identify the following cranial nerves: C.II – C.VIII, C.XII 5. You should also review the function of these nerves (and the cranial nerves not visible) and therefore be able to say whether each is afferent, efferent or both. 6. C.IX – C.XI appear as a series of rootlets. Although you cannot easily say which rootlets are part of which nerve, you should be able to identify their approximate location. Which nerve will be formed by the most rostral rootlets? Which by the most caudal ones? Rostral: C.IX(Glossopharyngeal) Caudal: C.XI (Accessory) In between: C.X (Vagus) Ventral view 7 7 06/12/2020 Cranial nerve testing https://www.youtube.com/watch?v=sJBpai74tlU 8 8