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Somatic Motor
stimulate skeletal muscle
somatic sensory
transmit sensations of touch, pain, and temperature, and position from sensory receptors
visceral motor
stimulate smooth muscle, modified cardiac muscle, and glands (sympathetic and parasympathetic)
visceral sensory
afferent component of autonomic reflexes and the conductors of pain impulses form internal organs
special sensory
afferent component of automatic reflexes and the conductors of pain impulses from internal organs
CNI: Olfactory Nerve
special sensory
function: smell from nasal mucosa of the roof of each nasal cavity
CNII: Optic
special sensory
function: vision from retina
CNIII: Oculomotor
Somatic and Visceral Motor
Function: raises superior eyelid; rotates eyeballs superiorly, inferiorly medially
CN IV: Trochlear
Somatic and Visceral Motor
Function: turns eyeball inferolateral
CN V: Trigeminal
three divisions
ophthalmic
maxillary
mandibular
somatic: sensory and motor
Function: sensation to face; motor to muscle of mastificaiton
CN VI: Abducens
somatic motor
function: turn eye laterally
CN VII: Facial
Somatic Motor and Sensory; Visceral Motor; Special Sensory
Function:
motor to muscles of facial expressions
general sensation from skin of both aspects of auricle
parasympathetic innervation to salivary glands, lacrimal glands, and glands of nose and palate
taste anterior 2/3 of tongue
CN VIII: Vestibulocochlear
Special Sensory (equilibrium and hearing)
Function: vestibular sensation to position and movement of the head; hearing
CN IX: Glossopharyngeal
Somatic Motor; Visceral Motor; Somatic Sensory; Visceral Sensory; Special Sensory (taste)
Function:
motor to assist with swallowing
parasympathetic innervation to parotid gland - salivation
tympanic cavity and mastoid cells - middle ear sensation
carotid body and sinus receptors - regulate BP
Taste posterior 1/3 of tongue
CN X: Vagus
Somatic Motor; Somatic Sensory; Visceral Motor; Visceral Sensory; Special Sensory (taste)
Function:
motor to constrictor muscle of the pharynx and muscles of the palate
sensation from auricle, external meatus, and posterior cranial fossa
parasympathetic innervation to muscles of trachea, bronchi, digestive tract, cardiac muscle
visceral sensation to heart and abdominal viscera
taste from epiglottis and palate
CN XI: Spinal Accessory
Somatic Motor
Function: motor to trapezius and sternocleidomastoid muscle
CN XII: Hypoglossal
somatic motor
function: motor to intrinsic and extrinsic muscles of the tongue