Terms in this set (24)
Cranial Nerves are
spinal nerves for your head
Cranial nerves carry....
General Sensory (info from face and head to brain)
Motor Commands (from brain to face and head and guts)
(info from eyes, nose, ears and tongue)
How many pairs of cranial nerves?
Cranial nerves serve the....
head and neck
general motor and sensory functions, sensory functions
What are the 3 types of cranial nerves?
Sensory (carry somatic (touch) or special sensory information
Motor (axons of somatic motor neurons)
Mixed (mixture of motor and sensory fibers)
Function: Vision & Visual Reflexes (blink to threat)
Rod cells: sensitive to white light and movement
Cone cells: provide color sensitivity
Function: eye movement, upper eyelid elevation, pupil constriction/reflex
Function: Downward and lateral (midline) eye movement, down and out
Function: 3 Major branches
1) Ophthalmic (V1) Face sensation (sensory)
2) Maxillary (V2) Face sensation (sensory)
3) Mandibular (V3) motor innervation to muscles of mastication, face sensation (sensory/motor)
*Important for oral stage of swallowing: chewing, bolus sensation
Function: Lateral (away from midline) eye movement
-Taste sensation (anterior 2/3 of tongue), -motor innervation to muscles of facial expression, lacrimation, salivation
*Important for oral stage of swallowing: taste, bolus formation; Speech articulation
Function: Hearing and vestibular sensation, orientation in space
2 branches: vestibular and acoustic
*important for hearing and sound localization
-Taste sensation (POSTERIOR 1/3 of tongue)
-carotid body reflexes (sense blood gases and pressures)
-Motor innervation of pharyngeal muscle
*important for oral and pharyngeal stages of swallowing: taste, salivation, pharynx elevation, gag reflex
-sensation from lower pharynx
-motor innervation of pharyngeal & laryngeal muscles
-muscles of the soft palate, heart, lungs and digestive tract
*Important for velum elevation, gag reflect, vocal fold tension, adduction and abduction
Mixed nerve BUT 90% sensory 10% motor
-Motor innervation of sternocleidomastoid and trapezius muscles
*important for head turning, shoulder elevation
-Motor innervation of intrinsic and extrinsic tongue muscles
*important for oral stage of swallowing: bolus formation, base of tongue retraction; speech: articulation
Name all of the Cranial Nerves
Very - Vestibulocohlear
Velvet - Vagus
Such -Spinal accessory
List if each nerve is sensory, motor or both
nerve innervation can be
afferent or efferent
to somatic (voluntary) muscles or visceral (involuntary muscles) structures
nerve impulse is carried AWAY from the CNS and towards the muscle in order to cause motor function
*study hint "get the eff AWAY from my CNS"
nerve impulse is carried FROM sensory stimuli TOWARDS the CNS and Brain
Where do the nerves originate?
5, 6, 7, 8 Pons
9, 10, 11, 12 Medulla
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