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460956
Cranial Nerves
Description
Notes from Doctors in Training
No tags specified
step 1 prep
usmle step 1
step 1 prep
Mind Map by
snlogel
, updated more than 1 year ago
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Created by
snlogel
almost 11 years ago
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Resource summary
Cranial Nerves
Site of exit from skull
Cribriform plate (CN I)
Optic canal (CN II)
Superior orbital fissure (CN III, IV, Ophthalmic branch of CN V, CN VI)
Foramen rotundum (Maxillary branch of CN V)
Foramen ovale (Mandibular branch of CN V)
Internal acoustic meatus (CN VII, VIII)
Jugular foramen (CN IX, X, XI)
Hypoglossal canal (CN XII)
Facial nerve
Temporal branch
Zygomatic branch
Buccal branch
Marginal mandibular branch
Cervical
Parasympathetic to lacrimal, submandibular and sublingual glands
Muscles of facial expression, stapedius, stylohyoid, posterior belly of the digastric muscle
Taste from anterior 2/3 of the tongue
Bell's palsy
Runs through parotid gland
Glossopharyngeal nerve
Parasympathetic to parotid gland, stylopharyngeus
Sensory from pharynx, middle ear, auditory tube, carotid body and sinus, external ear, posterior 1/3 of tongue (including taste)
Lesions: PICA infarct
Test: gag reflex
Nuclei
Midbrain (CN III, IV)
Pons (CN V, VI, VII, VIII)
Medulla (CN IX, X, XII)
Spinal cord (CN XI)
Cavernous sinus
CN III, IV, VI)
CN V (Ophthalmic, Maxillary)
Danger triangle
Neighboring structures
Optic chiasm
Pituitary gland
Sphenoidal sinuses
Internal carotid artery
Reticular activating system
Reticular formation
Mesencephalic nucleus
Thalamic intralaminar nucleus
Dorsal hypothalamus
Tegmentum
Vagal nuclei
Nucleus solitarius (sensory)
Taste
Baroreceptors
Gut distension
Nucleus ambiguous (motor)
Pharynx
Larynx
Upper esophagus
Dorsal motor nucleus (autonomic)
Heart
Lungs
Upper GI
Horner syndrome
Pancoast tumor
Brown-Sequard syndrome
Late stage syringomyelia
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