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9 Cards in this Set

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Defined as a simple motor action which is stereotyped and repeatable.
Reflex
It is elicited by a sensory stimulus and the strength of the motor response is proportional to the intensity of the stimulus
Reflex
A typical reflex arc has what five components?
1) receptors 2) sensory neuron 3) integrating center 4) motor neuron 5) effector
Four reflex characteristics:
graded, involuntary, patterned, "modifiable"
Examples of Deep Tendon Reflexes (DTR):
biceps (C5,C6), tricep (C6, C7), abdominal (T8-T12), knee (L2-4), ankle (S1 and S2)
A normal DTR indicates:
1)afferent nerves and dorsal roots are normal. 2)Dorsal root ganglion function is normal 3)Dorsal and Ventral horns are functioning appropriately. 4)Ventral roots and LMN are working properly. 5)Neuromuscular synapses are intact & skeletal muscle fibers are capable of normal contraction
An example of a spinal autonomic reflex that can be modified by the brain:
defecation reflex
A common pathological reflex
positive Babinski reflex
What occurs during a positive Babinski reflex
dorsiflexion of the great toe and fanning (extension) of the other toes when lateral aspect of sole of foot is stroked. Babies have a positive reflex.