Week 3 Semester 2 Quiz Flashcards
What does the term Dermatome refer to?
A dermatome is the area of skin innervated by a single spinal segment
What does an injury to the dorsal root of his C7 spinal nerve on his left side result in?
The left middle finger would have difficulty receiving sensations.
If the dorsal root of a spinal nerve is severed, what will happen?
The skin innervated by the affected spinal nerve would feel numb (anaesthetised)
The lower motor neurons of the somatic nervous system exert direct control over _____ _______.
Skeletal muscles
In the autonomic nervous system there is ________________________.
a synapse interposed between the central nervous system and the peripheral effector
What is damage of the anterior horn cells classed as?
lower motor neuron lesion
nuclear bag is stretched; frequency of action potentials _______.
Increases
True or False:
gamma efferents are stimulated; triggers contraction of myofibrils of intrafusal fibers
True
True or False:
frequency of action potentials is decreased; triggers contraction of extrafusal fibers
False
extrafusal fibers are stretched; _____ ______ is stretched
Nuclear bag
The resting tension in a muscle is called muscle _________
tone
What does the size principle state?
Motor units are recruited in order from small to large.
Which type of muscle fibre allows for extremely quick contractions but fatigues quickly?
Fast twitch
Central Pattern Generators are believed to support what types of movements?
movements that are rhythmic in nature
Mirror neurones respond to what?
The respond to both the observation of movement, the imagination of movement and execution of movement
