Download Cranial Nerves (I) Olfactory Olfactory foramen Smell Arise in

Cranial Nerves
Name/ # / Cranial opening
(I) Olfactory
Olfactory foramen
(II) Optic
Optic foramen
(III) Oculomotor
Superior Orbital fissure
(IV) Trochlear
Superior Orbital fissure
(V) Trigeminal
Ophthalmic branch:
Superior Orbital fissure
Maxillary Branch:
Foramen rotundum
Mandibular Branch:
Foramen ovale
(VI) Abducens
Superior Orbital fissure
General Function
Sensory Nerve Functions (Afferent)
Smell
Arise in olfactory mucosa & run
through cribriform plate of
ethmoid to synapse with bulb
Vision
Arise in retina of eye & pass
back to optic chiasma
Movement of eye Muscle proprioception
Superior/Inferior/
Medial Rectus,
Inferior Oblique,
Levator Palpebrae
Superioris
Muscle proprioception
Pain,
Temperature,
Touch, &
Proprioception
Innervates orbit cornea, upper
eyelid of eye, skin of nose &
forehead, mucosa of Frontal,
Sphenoid, & Ethmoid paranasal
sinuses
Innervates lower eyelid, skin of
temple, upper cheek & upper lip,
mucous membranes of palate,
pharynx, upper gums & teeth
Innervates skin of auricular
temporal region, lower lip,
external auditory meatus & lower
jaw, tympanic membrane, teeth
& gum of lower jaw, oral mucosa
of cheek, floor of mouth, anterior
2/3 of tongue
Muscle proprioception
Motor Nerve Functions (Efferent)
none
none
Pupillary constriction &
accommodation of the lens
Superior Oblique
Innervates the muscles of
mastication, swallowing,
movement of the palate,
auditory tube, tympanic
membrane, and ear ossicles
Lateral Rectus muscle
(VII) Facial
Taste
Internal Acoustic meatus
Taste buds of anterior 2/3 of
tongue & muscle proprioception
of face & scalp
(VIII)Vestibulocochlear
Vestibular Branch:
Internal Acoustic meatus
Conveys impulses associated
with dynamic & static equilibrium
from semicircular ducts &
vestibule
Conveys impulses from cochlea
of inner ear associated with
hearing
Taste buds of posterior 1/3 of
tongue, carotid sinus,
touch/pressure/temperature/pain
receptors of tongue, muscle
proprioception of swallowing
muscles
Conveys visceral impulses about
distention, pressure, & chemical
conditions of organs, taste
impulses from throat & epiglottis,
muscle proprioception
Muscle proprioception
Cochlear Branch:
Internal Acoustic meatus
(IX) Glossopharyngeal
Jugular foramen
(X) Vagus
Jugular foramen
(XI) Spinal Accessory
Jugular foramen
(XII) Hypoglossal
Hypoglossal canal
Taste
Muscle proprioception
Inneverates facial expression
muscles, scalp & neck,
lacrimal/sublingual/
submandibular/palatine & nasal
glands
none
none
Muscles of swallowing &
partotid salivary gland
Muscles of airways, lungs,
esophagus, heart, stomach,
small and large intestine,
gallbladder
Voluntary muscles of pharynx,
larynx, & soft palate, Trapezius
& Sternocleidomastoid
Muscles of tongue for speech &
swallowing
Spinal Nerves and Plexuses: (31 pairs of spinal nerves and 4 plexuses)
Spinal Nerves (Spinal nerves exit the vertebral column via intervertebral foramen)
Cervical 8 pairs -- (1st pair from above C1)
Thoracic 12 pairs
Lumbar 5 pairs
Sacral 5 pairs
Coccygeal 1 pair
Plexus
Spinal
Nerves
Cervical C1C5
Brachial C5T1
Lumbar
Nerves that
Arise
Motor Nerve Functions (Efferent)
Phrenic
---
Innervates the diaphragm
Axillary
Lateral arm to deltoid tuberosity
Deltoid and Teres minor
Radial
Triceps, Supinator, and
brachioradialis
Pronator teres and Flexor carpi
radialis
Flexor carpi ulnaris
Skin of the medial anterior thigh,
scrotum, cremaster muscle, and labia
majora
Skin of lateral anterior thigh, & dorsum Iliacus, Pectineus, Quadriceps
of foot
femoris, and Sartorius
Skin of penis & scrotum, vagina,
Ischiocavernosus, Bulbospongiosus,
clitoris, labia majora & minora
Levator ani, External anal sphincter
Lateral posterior leg, lateral aspect &
Semimembranous, Semitendinosus,
plantar surface of foot
Biceps femoris, Adductor magnus
Posterior arm & forearm, medial side
of posterior hand
Median
Palmar aspect of thumb, 2nd, 3rd, 4th
fingers
Ulnar
Medial portion of 4th & all of 5th finger
L1-L4 Genitofemoral No known
Femoral
Sacral
Sensory Nerve Functions (Afferent)
L4-S4 Pudendal
Sciatic
(main branches
Tibial, Fibular)
** Thoracic nerves do not form Plexuses with the exception of T1. These nerves are very segmental following each rib laterally.