Chapter 8 Flashcards
Feedback to the CNS about the activity of skeletal muscles is provided by
muscle spindle receptors and Golgi tendon organs
The somatotopic map of the primary motor cortex is called the
motor homunculus
A single motor neuron, together with all of the individual muscle fibers that it controls is referred to as a
motor unit
Theories of sensorimotor learning emphasize two kinds of learning-related changes in sensorimotor programs:
transferring the neural control of the learned sensorimotor response to higher levels of the CNS and increasing the conscious control of it
Apraxia is usually caused by lesions to the
left parietal lobe
Like the sensory systems, the sensorimotor system is
hierarchical, parallel, functionally segregated
Many areas of the cortex are involved in executing a muscle movement. What area seems to be most important in initiating a voluntary movement?
dorsolateral prefrontal cortex
Which structure is thought to be involved in the integration of the sensory information that is the basis for initiating a movement?
posterior parietal cortex
In general, research on the four descending motor pathways suggests that the two dorsolateral tracts are most involved in control of - while the two ventromedial tracts are more involved in the control of -
limb movements; control of posture and whole-body movements
What is most important in coordinating and modulating the entire sensorimotor system as it produces voluntary movements?
basal ganglia and cerebellum
A deficit in the ability to recognize objects by touch is called
astereognosia
What helps distribute the work between different motor neurons of a muscle’s motor pool?
cocontraction
The supplementary motor area and the premotor cortex are considered to be areas of the
secondary motor cortex
Contralateral neglect is usually associated with lesions to the
right parietal lobe
In general the various areas of secondary motor cortex are thought to
program specific motor sequences
