Cerebral Cortex Flashcards
What is MS?
An autoimmune disorder which results in the loss of myelin from neurons of the central nervous system
What are the main symptoms of MS?
Blurred vision Fatigue Difficulty walking Paraesthesia Muscle stiffness Spasms
What is the fast response in peripheral nerve stimulation called?
M wave (motor)
What is the H- wave?
This is when the same stimulus causes the activation of the sensory axons (sensory+motor response)
What is the F wave?
This is when a large stimulus causes activation of motor axons to conduct antidromically (motor+motor response)
What does orthodromic mean?
travelling in the normal direction in a nerve fibre
What is a motor evoked potential (MEP)?
The activation of upper motor neurons causing action potentials to travel along the entire motor pathway to cause muscle contraction
What is the total motor conduction time (TMCT)?
time from brain to muscle (MEP latency)
What is peripheral motor conduction time (PMCT)?
time from spinal cord to muscle along motor axon
How do you calculate PMCT?
(M latency + F latency -1) /2
How do you calculate CMCT?
TMCT - PMCT
