MVS 320 final review

MVS 320 final review - -motor control is the study of how...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
-motor control is the study of how the body moves in space (movement) and stabilizing the body in space (posture) includes task-specific movements - Hierarchical processing: -motor areas of the cerebral cortex at the top - Parallel Processing: -influence spinal cord directly and indirectly to induce voluntary movements -descending pathways through the brain stem influence signals reaching descending pathways of the spinal cord and then travel to muscles - Distributed control -uses many control centers to maintain voluntary movement. Different centers involved in planning, execution of movement - Integration: -the processing of multiple sources of information, repackaging, and transmitting, occurs at different levels of the nervous system in the form of electrical impulses. - Adaption: - the ability of the CNS to learn or change over time occurring at the cellular level, reflex level, and whole body level; neural plasticity - Motor Equivalence -the capacity to perform a given task in a variety of ways, possible because of degrees of freedom in the motor system - Degrees of Freedom - number of dimensions in which the system can independently vary, the degrees of freedom problem involves selection of patterns provided by motor equivalence to successfully perform a task 3 shoulder, 2 elbow, 2 wrist - Invariant characteristics of movement -bell shaped, time symmetric velocity curve, equal time spent accelerating and decelerating limb, minimize jerk, and most energy-efficient means of producing a movement -moving in the same way every time -involve MAP for discrete (triphasic) versus cyclic movements (rhythmic), the bell shaped velocity profile, and aperture formation during reach and grasp (deceleration phase, modified by other factors) -Kinematic -describes motion, not concerned with the forces required to produce them
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
- Kinetics -take forces producing motion into account position, velocity, acceleration - Reach and Grasp Movement -reach (transport) phase, grasp (aperture formation) phase -max aperture is reached during deceleration phase of transport phase, increases with increasing object size, loss of vision, and increasing speed of transport phase - Afferent System - provides sensory input, CNS integrates afferent information and generates a response -Efferent system -carries out the response, feedback during/after response communicated back up afferent system - Spinal Cord -gray matter in dorsal horns contains visceral sensory nuclei, somatic sensory nuclei, and carries afferent sensory information to the brainstem - dorsal horns afferent sensory information - ventral horns relays efferent information (somatic) contains cell bodies, dendrites, and interneurons of efferent neurons -local interneurons in the gray matter integrate sensory information into motor output -lateral horns contain autonomic efferent nuclei and the ventral contain somatic motor nuclei -Dorsal root ganglion contain cell bodies of afferent neurons - Brainstem -medulla oblongata
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/15/2012 for the course MVS 320 taught by Professor Drew during the Fall '11 term at University of Michigan.

Page1 / 14

MVS 320 final review - -motor control is the study of how...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online