Flashcards in Chapter 34 Part 1- Deck (33)
Loading flashcards...
1
2 categories of Nervous system
CNS (central)- brain and spinal cord.
PNS (peripheral) remaining nerves of brain and spinal cord
2
CNS (central)
Reflex arc - short cut in reflex system between the spinal cord and sensory nerve.
3
PNS (peripheral)
3 components:
-spinal nerves
-cranial nerves
-autonomic nervous system
4
Spinal nerves
From spinal cord to periphery
Motor and sensory
5
Pairs of spinal nerves
31:
Cervical- (neck)-8
Thoracic- (cheat) 12
Lumbar- (lower back) 5
Sacral- (hip) 5
Coccygeal (tail bone) 1
6
Where do spinal nerves exit
Spinal canal of vertebrae via intervertebral foramen.
7
Never end within the spinal cord do not
Regenerate and damage is usually permanent.
8
Pairs of cranial nerves
12.
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Statoacoustic (acoustic)
Glossopharyngeal
Vagus
Accessory
Hypoglossal
9
Olfactory nerve
Sense of smell
10
Optic nerve
Vision
11
Oculomotor
Supplies the muscles that move the eyes
12
Trochlear
Supplies muscle that moves eye downward/laterally
13
Trigeminal
Supplies teeth, oral cavity, max. Sinus, nasal cavity, and skin to face
14
Abducens
Supplies muscle that moves eye laterally
15
Facial
Muscles of facial expression
16
Statoacoustic
Hearing and balance (equilibrium)
17
Glossopharyngeal
Motor to stylopharyngeous
Sensory to posterior 1/3 of tongue
General sensations- pain, pressure, heat and cold
18
Vagus
Motor to larynx/pharynx
Taste and general sensations from root of tongue/epiglottis
19
Accessory (spinal accessory)
Supplies trapezius and SCM
20
Hypoglossal
Intrinsic/extrinsic muscles of the tongue
21
Visceral sensation
Sensation from viscera (organs) of the body
22
AND (autonomic)
2 parts:
-Sympathetic nervous system “fight or flight”
-parasympathetic “craniosacral outflow”
23
Antagonist
Have opposite actions
24
Sympathetic causes release of
Adrenaline
25
Autonomic is a 2 neuron system
Preganglionic neuron
Postganglionic neuron
26
Ganglion
Accumulation of cell bodies outside the CNS
27
Oral cavity nerves
Trigeminal (V)
Facial (VII)
Glossopharyngeal (IX)
Vagus (X)
28
Branches of trigeminal
3:
V1- opthalmic
V2- maximally
V3- mandibular
29
V1
3 branches:
Frontal
Lacrimal
Nasociliary
30
Where does V1 leave skull
Via supraorbital fissure
31
Frontal branch of V1
Via supraorbital notch
-Supraorbital nerve-skin above the eye and forehead. (Via supraorbital notch)
-Supra trochlear nerve- skin of upper medial corner of eye
32
Lacrimal branch of V1
Lacrimal gland
33
