P1 - Cranial Nerves Flashcards
(41 cards)
1
Q
CN I - Olfactory
A
- sensory
- smell
- nuclei: cerebrum
- only sensory neuron that does not synapse in thalamus
2
Q
CN I Exit
A
does NOT exit skull
cribriform plates
3
Q
CN II - Optic
A
- sensory
- vision
- nuclei: thalamus (diencephalon)
4
Q
CN II Exit
A
does NOT exit skull
optic canal
5
Q
CN III - Oculomotor
A
- motor
- eye movement (up, down, in)
- opens eyelids
- pupil constriction
- nuclei: midbrain
6
Q
CN III Exit
A
superior orbital fissure
7
Q
CN IV - Trochlear
A
- motor
- eye movement (down, in)
- nuclei: midbrain (posterior)
8
Q
CN IV Exit
A
superior orbital fissure
9
Q
CN V - Trigeminal
A
- both sensory + motor
- facial sensation
- muscles of mastication
- nuclei: midbrain (V1), pons (V2), medulla (V3)
10
Q
CN V Exit
A
- V1 = superior orbital fissure
- V2 = foramen rotundum
- V3 = foramen ovale
11
Q
CN VI - Abducens
A
- motor
- eye movement (lateral)
- nuclei: pons (midline)
12
Q
CN VI Exit
A
superior orbital fissure
13
Q
CN VII - Facial
A
- both sensory + motor
- muscles of facial expression
- closes eyelids
- salivation + lacrimation (tears)
- taste (anterior 2/3)
- nuclei: pons
14
Q
CN VII Exit
A
- internal auditory meatus
- stylomastoid foramen
15
Q
CN VIII - Vestibulocochlear
A
- sensory
- proprioception
- hearing
- nuclei: b/w pons + medulla
16
Q
CN VIII Exit
A
internal auditory meatus
17
Q
CN IX - Glossopharyngeal
A
- both sensory + motor
- pharyngeal muscles
- salivation
- carotid body reflexes (BP)
- swallowing + gag reflex
- taste (posterior 1/3)
- nuclei: medulla
18
Q
CN IX Exit
A
jugular foramen
19
Q
CN X - Vagus
A
- both sensory + motor
- pharyngeal muscles
- swallowing + gag reflex
- larynx (speech)
- parasympathetic to most visceral organs
- nuclei: medulla (upper)
20
Q
CN X Exit
A
jugular foramen
21
Q
CN XI - Accessory
A
- motor
- head rotation
- shoulder shrug
- nuclei: inferior medulla, spinal cord
22
Q
CN XI Exit
A
- enters skull via foramen magnum
- exits via jugular foramen
23
Q
CN XII - Hypoglossal
A
- motor
- tongue movement
- nuclei: medulla (upper)
24
Q
CN XII Exit
A
hypoglossal canal
25
Crista Galli
- olfactory bulbs
- FC = loss of smell
26
Cribriform Plate
- CN I
- FC = loss of smell
27
Optic Canal
- CN II, opthalmic artery
- FC = blindness, visual field abnormalities, loss of pupillary constriction
28
Foramen Rotundum
- CN V2 (maxillary division)
- FC = loss of sensation + pain in maxillary region, loss of motor function of ipsilateral muscles of mastication
29
Foramen Ovale
- CN V3 (mandibular division)
- FC = loss of sensation + pain in mandibular region, loss of motor function of ipsilateral muscles of mastication
30
Foramen Spinosum
- middle meningeal artery
- FC = epidural hematoma
31
Foramen Lacerum
filled w/ cartilage in life
32
Groove for Middle Meningeal Artery
- middle meningeal artery
- FC = epidural hematoma
33
Groove for Superior Petrosal Sinus
- superior petrosal sinus
- FC = improper drainage
34
Internal Auditory Meatus
- CN VII, CN VIII, labyrinthine artery + vein
- FC = paralysis of facial muscles, abnormal taste, dry conjunctiva, hearing loss, tinnitus
35
Jugular Foramen
- CN IX, CN X, XN XI, internal jugular vein
- FC = loss of taste + sensation of soft palate, uvula deviation, vocal cord paralysis, paralysis of neck muscles
36
Sulcus for Transverse Sinus
- transverse sinus
- FC = improper drainage
37
Hypoglossal Canal
- CN XII
- FC = weak tongue muscles (deviation toward affected side), speech disturbance
38
Foramen Magnum
- spinal cord, vertebral arteries, CN XI roots
- FC = paralysis, death, paralysis of neck muscles
39
Sulcus for Superior Sagittal Sinus
- superior sagittal sinus
- FC = improper drainage
40
Superior Oribittal Fissure
- CN III, CN IV, CN V1 (ophthalmic division), CN VI, superior ophthalmic vein
- FC = pupil dilation, ptosis, loss of normal pupillary reflex, eye positioned down + out, inability to look down + in, loss of sensation + pain in opthalmic region, inability to look laterally, improper drainage
41
Stylomastoid Foramen
- CN VII
- FC = paralysis of facial muscles, abnormal taste, dry conjunctiva
