Muscles/movement Flashcards
Neuromuscular junction
An axon branching to innervate several muscle fibers
Motor end plate
Smooth muscle
Movement? Shape? # of nuclei? Striations (stripes)? Control?
Organ and digestive movement
Spindle, thin cells
1 nuclei
No stripes
Involuntary control
Skeletal muscle
Movement? Shape? # nuclei? Striations? Control?
Muscle movement
Long, cylindrical
Many nuclei located on side
Yes stripes
Voluntary control
Cardiac muscle
Movement? Shape? # nuclei? Striations? Control?
Heart movement
Cylindrical with branches
1 or 2 nuclei in each cell
Yes stripes
Involuntary control
Intercalated discs
Prefrontal cortex
Responds to light, noises, and other sensory signals that lead to movement
Calculates predictable outcome of actions
Plans movement according to those actions
Posterior parietal cortex
Keeps track of body position relative to the world
Important for planning movement
Damage causes difficulty coordinating visual stimuli with movement
Supplementary motor cortex
Organizes rapid sequence of movements in a specific order, inhibitory if necessary
Active seconds before the movement
Promotor cortex neurons fire when preparing to make a movement, NOT once movement begins
True or false
True
It is difficult to make simultaneous same side voluntary clockwise and counterclockwise movements
True or false
True
Anti saccade task
Most children under age 5 have difficulty looking away from a moving target
