UMN & LMN Flashcards
(26 cards)
CNS
Parts of the spinal cord and brain
responcible to interpretation and action
PNS
relay sensory info to CNS
motor info from CNS to PNS
ANS
regulates Temp and respiration
sympathetic and parasympathetic components
Monosynaptic Reflex Arc
basic building blocks of CNS
fundemental for human movement
1 synapse 2 neurons
Disynaptic Reflex Arc
2 synapses
How are Lesions of the nervous system classified
UMN and LMN
What do UMN disorders result in
Spasticity, Hyperflexia, Exgaggerated strech reflex
Examples of UMN disorders
CVA, head injury, MS, SCI, Cerbral Polsy
Spastic Synergy Upper Extremity
Wrist flexed, Fingers Flexed, Elbow flexed, Sholder interal rotation
Spastic Synergy Lower Extremity
Hip Internally rotated. Knee extended Foot invertd
Complications of Spasticity
Limited Functional Capactiy
Osteoparosis
Bladder and Bowel Problems
Examples of LMN
Polio
Tramatic Peripheral nerve injury
What is Spinal Polio
most common form of polio. results from viral invasion of the motor neuron in the anterior horn
What is a peripheral nerve
A periphernal nerve is a nerve outside of the brain and spinal cord
What are the parts of a peripheral nerve
axon mylin sheath swhwann cells cell body
examples of an acute nerve injury
fracture
burns
surgery
examples of a chronic nerve injury
tumor
tight nerve passage
How to classify a PNI
by severity
3 classifications of a PNI
Neuropraxia- least severe
axonotmesis- modern severity
Neurotmesis-most severe
Signs of a PNI
Weakness
Paralysis
Muscle Atrophy
Loss of Sensation
4 stages of wallerian Disease
- wallerian degeneration at site of injury
- schwann cells form new mylin sheath
- axon grows down mylin sheath
- sucsesful connect to end organ- sensation/muscle function returns
Wallerian Disease- does sensory and motor function return?
while motor function may return, sensory may not
Reproical Inhibition
reflex relaxation of antagonist muscle when agonist contracts/
DTR
Deep tension Reflexes
