Reflexes and Responses Flashcards
True/False. A conscious integration occurs at the level of the spinal cord and will give us a reflex.
False. Unconscious
A reaction/ response occurring in the cortex of the brain is what kind of integration?
Conscious
What kind of a reflex and response to a stimulus is the withdrawal of a limb?
Unconscious response, somatic reflex
The bladder reflex is what kinda of reflex?
Visceral reflex
Which of the following is false regarding the reflex arc?
a. If any component in the reflex circuit is “broken,” reflex will not happen
b. Can have both somatic and visceral reflexes
c. The reflex requires the cerebral cortex for conscious response
d. All the above are true
c. The reflex requires the cerebral cortex for conscious response
- reflex does NOT require cerebral cortex = unconscious
What sections of the spinal cord are examined for a gait analysis?
Cervicothoracic region C6-T2
Lumbosacral region L4-S2
How will an animal respond if the myotactic/stretch arc is intact?
They will “push back” or kick their legs out
How will an animal respond to a cutaneous stimulation, light pinch, in the limbs if the arc is intact?
Withdrawal the limb (withdrawal/ flexor reflex)
What reflexes can you use the Stretch (Myotactic) Reflex to test?
Patellar reflex
Triceps reflex
Biceps reflex
What is clonus?
When the muscle relaxes after a reflex is over and then joint/ tendon stretches again “cloning” the reflex
Upper brain centers present the clonus via inhibition of ____ activity.
Lower Motor Neuron
What is usually associated with an UMN disorder?
Hyper-reflexive state and/or clonus
What can we use cutaneous stimulation to test?
Autonomous zones of various nerves
Panniculus (cutaneous trunci) reflex
Recumbent withdrawal/crossed extensor reflex
Perineal reflex
What is the Panniculus Reflex useful for?
Locating C8 and T1 spinal cord lesion and their contribution sot the lateral thoracic nerve
When testing the sensory stimulus of the panniculus reflex where do you begin and how far cranially do you progress when compressing the skin?
Begin at L4 and progress cranially to T2
Is the withdrawal (Flexor) Reflex monosynaptic or polysynaptic?
Polysynaptic
What segments of the spinal cord are you testing with the perineal reflex?
S1-S3 and the pudental nerve