Reflexes
A type of neuron that conveys sensory information to the CNS from stimuli in the periphery
Afferent Neuron
The loss of muscle mass with aging
Sarcopenia
The area of the spinal cord where the motor neuron of motor unit originates
Ventral horn
A process of axon recovery in which surviving axons develop sprouts to reinnervate abandoned target
Collateral Sprouting
A process in which Na+ and K+ ions flow from high to low concentrations
Ionic flow
Provides rapid feedback about changes in muscle length
Muscle Spindle
A predictor for mortality, associated with mobility limitation
Walking endurance
The muscle force that a motor unit can produce largely depends on what?
Innervation number
A process in which residual neural tissue takes over a function that has been lost to injury or disease
Compensation
The ion channel that is largely responsible for establishing the resting membrane potential
Leak channels
Proprioceptor with only afferent neuron connections
Golgi tendon organ
A motor unit property that is unaffected by aging
Minimal discharge rate
The Gold standard for recording motor unit action potentials
Intramuscular electrodes
The most characterized change in synaptic function is?
Long-term potentiation (LTP) and depression (LTD)
The equation used for calculating the equilibrium potential of an ion
Nernst equation
Occurs when the Renshaw Cell inhibits an inhibitory neuron in the stretch reflex
Disinhibition
The delay (time) between an electrical event and the a mechanical event
Electromechanical delay
This method of recording muscular electrical activity includes an averaging device that samples muscle force at that time point
Spike-Triggered Averaging
Several weeks of skilled reach training increase the size of which area of the motor map in the rat motor cortex?
Distal motor map
The part of an action potential in which Na+ channels close and K+ channels open
Repolarization
The reason for the amplitude of the H reflex declining with an increase in stimulus strength beyond ~12mA
Antidromic collision
Is increased by speed training
dF/dt of submaximal muscle contractions
A protocol that entails measuring twitch and tetanic forces in single motor units
Burke Protocol
Autoimmune disorder that disrupts myelination of peripheral nerves. Football player Travis Frederick was affected by this.
Guillain-Barre Syndrome
Transformation of the nerve action potential into a muscle fiber action potential
Neuromuscular propagation