The flashcards below were created by user
amills1
on FreezingBlue Flashcards.
-
How many pairs of nerves?
- 31 total pairs
- Cervical 8 (C1-C7 exit above, C8 below C7)
- Thoracic 12
- Lumbar 5
- Sacrum 5
- Coccygeal 1
- All exit below corresponding vertebra besides C1-C7
-
Thoracic Nerves splint into a posterior and anterior....
Rami
-
Cervical Plexus
- C1-C4 spinal nerves
- Innervate deep muscles of neck, anterior neck, levator scapula, SCM and traps
-
Phrenic Nerve
- C3-C5
- Only innervation of diaphragm for motor and main sensory
-
Brachial Plexus
- Anterior primary rami of C5-T1.
- Provides motor and sensory.
- Innervation to muscles from multiple roots (nerves overlap innervation locations)
-
-
Axillary
- Thoracic
- Deltoid
- Teres minor
-
Radial
- Thoracic
- Extension of elbow, wrist, and fingers
-
Median
- Thoracic
- Forearm pronation
- Wrist and finger flexion
- Thumb abduction and opposition
-
Ulnar
- Thoracic
- Wrist and finger flexion
- Finger abd/add
-
Lumbosacral Plexus
- Anterior primary rami of L1-S3
- Muscles of thigh, lower leg, and foot
-
-
Femoral
- Hip flexion
- Knee extension
-
-
Inferior Gluteal
Glute max
-
Sciatic Nerve
- Hamstring
- Hip extension
- Knee flexion
-
Common Peroneal
- Comes off of sciatic
- Anterior and lateral leg
- Dorsum of foot
-
Tibial
- From sciatic
- Posterior of leg
- Plantar Flexion Foot
-
Efferent Peripheral Nerve Fiber
- Large cel body
- Multiple branched dendrites and long axon
- Cell bodies in anterior horn
-
Afferent Peripheral Nerve Fiber
- Long dendrite originating in skin, tendon or GTO
- Travels to cell body in dorsal root ganglion
- Travels through dorsal root of spinal nerve into SC thru dorsal horn
- Can terminate at horn or enter white matter fiber tracts and ascend
-
GTO
- Golgi tendon organ
- Encapsulated nerve endings found at musculotendenous junction
- They're sensitive to tension with in muscle tendons and transmit this info to SC
-
SNS
- Sympathetic Nervous System
- Dilates lungs and contricts blood
- Flight or fight response
- Norepinephrine (neurotransmitter) controls circulation
- HR and BP increase
- Increase blood flow to muscles
- Decreased blood flow to GI
-
Cranial and Sacral dominate the innervation for this nervous system...
Parasympathetic
-
Thoracic and lumbar innervate this nervous system....
Sympathetic
-
PNS
- "Rest and digest" or "feed and breed"
- Maintain vital body function/homeostasis
- Info recieved from brainstem and from lower sacral segment of SC
- Relates to CNIII, VII, IX, X
-
CN X
- Vagus
- Innervates myocardium and smooth muscles of lungs and digestive tract
- Stimulation causes bradycardia, decreased stroke volume, increase of mucus, peristalsis and glandular secretions.
-
PNS Sacral Components
- Bowel
- Bladder
- Sexual arousal
-
Acelylcholine
Produces vasodilatation reversing SNS
-
Brain requires constant circulation due to...
Requires readily available glycogen for energy since it cannot create its own
|
|