Spinal Cord Anatomy Flashcards
(24 cards)
Dorsal Horn
Gray matter
receives sensory info from periphery
Dorsal Root
bundle of central sensory axon branches that enter dorsal horn
Dorsal Root Ganglia
sensory ganglia that contains cell bodies of sensory axon
Spinal Nerve
mixed nerve that contains peripheral sensory axon branches
Ventral Horn
Gray matter
bundles of LMN cell bodies
Ventral Root
Bundles of LMN axons that exit the ventral horn
Ascending Tracts
White matter
Send information to the brain from periphery
Dorsal Column Tract
Spinocerebellar Tract
Anterolateral Spinothalamic Tract
Dorsal Column Tract
Somatosensory information
Spinocerebellar Tract
Proprioceptive information
Spinothalamic Tract
Nociceptive pain information
UMN
Cell bodies reside in primary motor cortex or brainstem
LMN
Cell bodies reside in ventral horn of Spinal Cord or brainstem
Descending Tracts
White matter
Send info from UMNs to LMNs
Lateral corticospinal tract
Anterior-medial corticospinal tract
Reticulospinal tract
Vestibulospinal tract
Anterior Spinal Artery
Supplies Anterior or Lateral region of Spinal Cord
Posterior Spinal Artery
WE HAVE 2
supplies posterior region of Spinal Cord
Spinal Arterial Plexus
A complex weave around the SC to supply multiple routes of bloodflow
Anterior Rami (Ventral)
Carries BOTH Sensory and Motor
Motor to trunk and limbs
Anterior Root
ONLY carries Motor
Posterior Rami (Dorsal)
Carries BOTH Sensory and Motor
Motor to back muscles
Sensory to skin, head, back, and neck
Upper-Cervical Spinal Cord Injury
Most severe injury
paralysis in UE, trunk, and LE
Power wheelchair
Lower-Cervical Spinal Cord Injury
UE paralysis depending on the level lesion is at
if above C4, pt can breath on their own
Thoracic Injury
Injury mainly to trunk and LE
manual wheelchair
Lumbar and Sacral
Little to no voluntary control of bowel and bladder
Loss of Function in hips and legs
