Page 549 - First Aid for the USMLE Step 1 2020, Thirtieth edition [MedicalBooksVN.com]_Neat

Neurology aNd Special SeNSeS ` neurology—AnAtomy And Physiology Neurology aNd Special SeNSeS ` neurology—AnAtomy And Physiology SecTioN iii 505

Cranial nerve nuclei Located in tegmentum portion of brain stem Lateral nuclei = sensory (aLar plate).
(between dorsal and ventral portions): —Sulcus limitans—
ƒ Midbrain—nuclei of CN III, IV Medial nuclei = Motor (basal plate).
ƒ Pons—nuclei of CN V, VI, VII, VIII
ƒ Medulla—nuclei of CN IX, X, XII
ƒ Spinal cord—nucleus of CN XI

Cranial nerve and vessel pathways

Anterior Cribriform plate CN I
cranial fossa
(through
ethmoid bone)
CN II
Optic canal
Ophthalmic artery
Middle CN III
cranial fossa Superior orbital fissure CN IV
(through CN VI
sphenoid bone)
CN V
1
Foramen Rotundum CN V 2
Foramen Ovale CN V 3
Foramen spinosum Middle meningeal artery
Internal auditory meatus CN VII
CN VIII
Posterior CN IX
cranial fossa Jugular foramen CN X
(through CN XI
temporal or Jugular vein
occipital bone) CN XII
Hypoglossal canal
Brain stem
Foramen magnum Spinal root of CN XI
Vertebral arteries
Divisions of CN V exit owing to Standing Room Only

FAS1_2019_12-Neurol.indd 505 11/8/19 7:39 AM