Anatomical Systems Flashcards
Your patient demonstrates an area of diminished to absent sensation and parasthesia over the lateral aspect of the right thigh.
hypotheses?
Either there is an issue with L2 or the peripheral nerve
Tendon reflexes
stretch receptors send afferent impulse and then it synapses on the motor nerve that connects to the m.
What nerve pathways do reflex tests test?
afferent n. leaving the m. from stretch receptors, spinal cord, and efferent m. n.
What do myotome tests investigate?
How a weakness in one muscle can indicate a problem with which nerve
ex. myotome test for weak triceps
If a peripheral n. (radial n.) problem, weak triceps
If it’s the spinal segment, test the dermatome at C7
What connects myotome and dermatome info for each spinal segment?
A spinal n. will have a prescribed sensory distribution on the skin and a group of m. it contributes axons to
Reasons for m. impairment
spinal or peripheral n. involvement CNS function (central inhibition in CNS won't let you contract m. b/c of too much pain) disuse injury/mechanical stress disease ischemia (cramping and claudication)
What are myotomes?
peripheral n. muscle innervations
Explain myotome testing
looking for m. weakness predominantly innervated by specific spinal n.
use isometric testing
What are clinical signs of m. impairment?
decrease control
m. atrophy
pain
myotomes for shoulder shrug?
C2, C3, C4
myotomes for shoulder abduction
C5
myotomes for elbow flexion?
C6
myotomes for elbow extension?
C7
myotomes for thumb extension?
C8
