Chapter 13: Spinal Cord Flashcards
4 Functions of Spinal Cord
Conduction
Neural Integration
Locomotion
Reflexes
Cauda Equina and its Location
bundle of nerve roots
bottom of vertebral canal (L2-S5)
3 Meninges of Spinal Cord from superficial to deep
Dura Mater
Arachnoid Mater
Pia Mater
White Matter
surround gray matter and provide tracks for communication up and down the cord
Gray Matter
site of neural integration
Gracile Fasciculus
Column: Posterior
Decussation: Yes
Functions: sensations of limbs and trunk position and movement, deep touch, visceral pain
Spinothalamic
Column: lateral and anterior
Decussation: yes
Function: sensations of touch
Lateral Corticospinal
Column: Lateral
Decussation: yes
Functions: fine control of limbs
Lateral Reticulospinal
Column: Lateral
Decussation: No
Functions: balance and poster, regulation of awareness of pain
Layers of the nerve
Epineurium
perineurium
endoneurium
Ganglion
cluster of neurosomas outside the CNS
Cervical
8
thoracic
12
lumbar
5
sacral
5
coccygeal
1
5 plexuses of the anterior rami
Cervical Brachial Lumbar Sacral Coccygeal
Dermatome
area of skin that the spinal cord get sensory information from
Reflexes
quick involuntary stereotyped reactions of glands or muscles to stimulation
4 properties of reflexes
require stimulus
quick
involuntary
stereotypes
Proprioceptors
sense organs specialized to monitor the position and movement of body parts
3 classes of nerve fibers in muscle spindles
primary afferent fiber
secondary afferent fiber
gamma motor neurons
Reciporocal inhibition
reflex phenomenon that prevents muscles from workinf against each other by inhibiting the antagonist
