Spinal Cord Flashcards
Dorsal horn
Sensory afferent
Interneurons
Within and between spinal cord segments
Ventral horn
Alpha and gamma motor neuron outputs efferent
Lateral horn
Sympathetic nervous system output
3 meninges layers
Dura mater
Pia mater
Arachnoid mater
Denticulate ligament
Attaches laterally midway between dorsal and ventral root
Terminal filament
Formed by a cord of meninges at the caudal end of the spinal cord
Epidural space
Between dura of spinal cord and periosteum of vertebrae
Connective tissue fat, blood vessels
Cauda equina
Bundle of nerve fibers after the spinal cord has terminated
Includes conus medullaris and spinal roots
Cauda equina syndrome
Compression of one of these nerves
Pain, atrophy of muscles, incontinence
Spinal nerves exit via
Intervertebral foramen
Name 1
Epidural space
Name 2
Pia mater
Name 3
Arachnoid
Name 4
Dura mater
Name 5
Dorsal root
Name 6
Denticulate ligament
Name 7
Spinal ganglion
Name 8
Ventral root
Dorsal median sulcus
Divides dorsal cord into right and left halves
Ventral median fissure
Divides ventral cord into right and left halves
Dorsalateral sulcus
Site of intersection of dorsal roots of peripheral nerves
Ventrolateral sulcus
Site where efferent motor roots are leaving the cord
White matter
Myelinated
Low capillary density
Contains FIBER TRACTS
Grey matter
Butterfly shape
High number of cell bodies
Glia
Capillaries
White matter
Fiber tracts or long tracts
Nerve fibers run together in bundles carrying related information
Ascending fiber tracts
Information from periphery to brain
Descending fiber tracts
Information from brain to periphery
Group of fiber tracts run together within the same region of the cord
Funiculus
Name 1
Dorsal median sulcus
Name 2
Intermediate sulcus
Name 3
Dorsolateral sulcus
Name 4
Dorsal funiculus
Name 5
Ventrolateral sulcus
Name 6
Ventral median fissure
Lateral funiculus
Between dorsolateral and Ventrolateral sulci
Mixed tracts both ascending and descending tracts located here
Ventral funiculus
Located between Ventrolateral sulcus and ventral median fissure
Mostly descending tracts
Hansens type I disk disease
Degenerate nucleus material extrudes into vertebral canal
Hansens type II disk disease
Fibroid nucleus gradually protrudes
Discospomdylitis
Inflammatory
Bacterial or fungal infection
German shepherds
Painful
Degenerative myelopathy
Slow progressing degenerative disease
German shepherds
Diffuse degeneration of spinal cord myelin and axon in the white matter
Equine motor neuron disease
Death of lower motor neurons whose cell bodies are in the brain stem and spinal cord
C6 - C8
Nerve
Musculocutaneous n.
C7-T1
Nerve
Radial
C8- T1
Nerve
Ulnar
L6- S1
Nerve
Sciatic
L4-L6
Nerve
Femoral
C8-T2
Nerve
Lateral thoracic nerve
Musculocutaneous
Spinal cord segments
C6-C8
Radial nerve
Spinal cord segments
C7-T1
Ulnar nerve
Spinal cord segments
C8-T1
Sciatic nerve
Spinal cord segments
L6-S1
Femoral nerve
Spinal cord segments
L4-L6
Lateral thoracic nerve
Spinal cord segments
C8-T2