Spine + Movement Flashcards
Somatic sensory (Afferent limb, incoming)
> in through spinal nerve –> sensory cell body w/ dorsal root ganglion (DRG) –> dorsal root –> interneuron, cell body located in DRG
Somatic motor (Efferent limb, outgoing)
Voluntary body movements in response to incoming stimuli, >interneuron –> motor cell body within the ventral (ant.) horn –> ventral root –> out through spinal nerve, cell body located in ventral (ant.) horn
Dorsal (post.) horn
Primarily sensory reception
Intermediate horn
Sympathetics, in T1-L2
Ventral (ant) horn
Primarily motor functionality
Where do the nerves exit out in the vertebral column?
Generally: one spinal nerve for each spinal vertebra and the spinal nerves exit through the intervertebral foramen of its numbered vertebrae and the vertebrae below it.
How are the nerves in the cervical spine different? in the way they exit
*there are 8 cervical nerves that exit and they do so above their respective vertebrae (ie. 1st cerv nerve exits ABOVe the 1st cerv nerve)
***EXCEPTION: 8th cervical spinal nerve exits btwn the C7 and T1
How is the radial nerve tested during a comprehensive neuro exam?
*extension @ arm and wrist** Test: have pt extend arm and wrist
How is the ulnar nerve tested during a comprehensive neuro exam?
** finger adduction, wrist flexion*** Test: have pt adduct their fingers
How is the median nerve tested during a comprehensive neuro exam?
thumb flexion, wrist flexion Test: havve pt flex their thumb
Describe the condition of bell’s palsy and the nerve affected
*most common facial palsy, due to damage or trauma to the facial nerve: CN VII
**SYmptomsL facial muscle paralysis, loss of taste, sensitivity to loud sounds
Describe gait testing (cerbellum vs. basal ganglia)
Basal ganglia: starting and stopping movement, cerebellum: fluid, smooth movement in the middle of an action, test:romberg
