Term
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Definition
Component: Sensory - afferent info coming in.
Function: Smell
Tract: Olfactory cells of nasal mucosa->olfactory bulbs -> pyriform cortex |
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Term
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Definition
Components: Sensory
Function: Vision
Tract: retinal ganglion cells
-> optic chiasm -> thalamus (Geniculate) -> primary visual cortex in occipital lobe |
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Term
Cranial Nerve III
Oculomotor
Component 1 |
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Definition
Component 1: motor (move eye)
Function: Movement of eyeball and lens accomodation.
Structures innervated: 4 eyeball muscles and 1 eyelid muscle |
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Term
Cranial Nerve III
Oculomotor
Component 2 |
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Definition
Component 2: Parasympathetic
Nucleous location: midbrain
Function: pupil constriction (sympathetic causes dialation)
Structures innervated: ciliary muscle and pupilary constrictor muscle. |
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Term
Cranial Nerve IV
Trochlear |
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Definition
Component: Motor
Function: moves eyeball
Nucleous location: midbrain
Structures innverated: superior oblique muscle |
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Term
Cranial Nerve V
Trigeminal
Component 1 |
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Definition
Component 1: Sensory(impulses of touch, pain, heat, and cold)
Location of Nuclei: pons and medulla
Function: 1.sensations 2. general sensory from tongue 3. proprioception
Structures innervated: 1. face, scalp, teeth, lips, eyeballs, nose & throat lining 2. anterior 2/3 of tongue 3. muscles of mastication |
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Term
Cranial Nerve V
Trigeminal
Component 2 |
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Definition
Component 2: motor
Function: chewing
Nucleous location: trigeminal motor nucleous in pons
Structures innervated: muscles of mastication |
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Term
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Definition
Component: Motor
Function: Eyeball movement
Nucleous: abducens nucleus in pons
Structures innervated: lateral rectus muscle of eye |
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Term
Cranial Nerve VII
Facial
Component 1 |
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Definition
Component 1: Sensory
Function: taste & proprioception
Nucleus location: medulla
Structures innervated: 1. anterior 2/3 of tongue 2. face and scalp |
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Term
Cranial Nerve VII
Facial
Component 2 |
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Definition
Component 2: Motor
Function: facial expression
Nucleus location: facial motor nucleus in pons
Structure innervated: muscles of the face |
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Term
Cranial Nerve VII
Facial
Component 3 |
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Definition
Component 3: Parasympathetic
Function: Salavation and lacrimation(drooling and tears)
Nucleus location: Superior salivatory nucleus in medulla
Structure innervated: salivary and lacrimal glands via submandibular and pterygopalatine ganglia |
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Term
Cranial Nerve VIII
Vestibulocochlear
aka acoustic or auditory nerve |
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Definition
Component: Sensory - location inner nerve
Functions: Balance & hearing
Nucleus: pons and medulla
Structures innervated: 1. vestibular apparatus of internal ear 2. cochlear of inner ear 3. auditoy cortex in the temporal lobes |
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Term
Cranial Nerve IX
Glossopharyngeal
Component 1 |
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Definition
Component 1: Sensory
Function: 1. taste 2. proprioception for swallowing 3. blood pressure receptors
Nucleus location: medulla
Structures innervated: 1. posterior 2/3 of tongue 2. throat muscles 3. carotid sinuses |
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Term
Cranial Nerve IX
Glossopharyngeal
Component 2 |
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Definition
Component 2: Motor
Function: 1. swallowing and gag reflex 2. tear production
Nucleus location: medulla
Structure innervated: 1. throat muscles 2. lacrimal glands |
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Term
Cranial Nerve IX
Glossopharyngeal
Component 3 |
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Definition
Component 3: Parasympathetic
Function: saliva production
Structures innervated: parotid glans - include parotid, submandibular, and sublingual |
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Term
Cranial Nerve X
Vagus
Component 1 |
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Definition
Component 1; Sensory
Function: 1. chemoreceptore 2. pain receptors 3. sensations 4. taste
Nucleus location: medulla
Structures innervated: 1. blood oxygen concentration, carotid bodies 2. respiratory and digestive tracts 3. external ear, larynx & pharynx 4. tongue |
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Term
Cranial Nerve X
Vagus
Component 2 |
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Definition
Component 2: Motor
Function: 1. heart rate stroke volume 2. peristasis 3. air flow 4. speech and swallowing
Nucleus location: Medulla
Structures innervated: 1. pacemaker & ventricle muscles 2. smooth muscles of the digestive tract 3. smooth muscle of bronchial tubes 4. muscles of larynx & pharynx |
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Term
Cranial Nerve X
Vagus
Component 3 |
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Definition
Component 3: Parasympathetic - helps to improve digestion
Structures innervated: smooth muscles and glands of the same areas innervated by motor components, as well as thoracic & abdominal areas |
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Term
Cranial Nerve XI
Spinal Accessory |
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Definition
Component: Motor
Function: Head rotation and shoulder shrugging
Nucleus location: accessory nucleus in medulla
Structures innervated: trapezius and sternocleidomastiod muscles (head rotation muscle) |
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Term
Cranial Nerve XII
Hypoglossal |
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Definition
Component: Motor
Function: Speech & swallowing
Nucleus location: medulla
Structures innervated: throat and tongue muscles |
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