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Motor Control Systems
Assignment 1 (Chapter 7)
Search for images, cartoons, and animations related to muscle contraction.
Hints for Assignment 1
Try using the following search terms: myofibril, thick filaments, myosin, and sarcoplasmic reticulum.
Be sure to view the animation on this site (this link will open in a new window).
Assignment 2 (Chapter 7)
Hugh Huxley is a name associated with the sliding filament hypothesis of muscle contraction. Describe his contributions.
Hints for Assignment 2
A. F. Huxley, who together with Alan Hodgkin established the mechanism of the action potential, also worked on muscle contraction and made important contributions to the sliding filament hypotheses. Do not confuse the two Huxleys.
Assignment 3 (Chapter 8)
Search for pictures of segmental cross sections of the spinal cord at the sacral, lumbar, thoracid, and cervical levels. Identify the gray matter and the white matter at each level, and describe why the gray and white matter change in relative proportion at different positions along the spinal cord.
Assignment 4 (Chapter 9)
Locate an atlas of neuroanatomy and use it to find the locations of the following brain structures related to the control of movement:
- red nucleus
- basal ganglia
- primary motor cortex
- pyramidal tract
Assignment 5 (Chapter 10)
The oculomotor neurons that control the extraocular muscles are found in three cranial nerve nuclei in the brainstem:
Use neuroanatomy resources on the internet to find the locations of these nuclei in cross-sections of the human brainstem.
- the oculomotor
- trochlear and
- abducens nuclei
Assignment 6 (Chapter 11)
GTP binding proteins (G-proteins) are important in linking certain types of neurotransmitter receptors to their cellular actions in the nervous system. Two examples in the autonomic nervous system are the actions of norepinephrine and acetylcholine on the heart. G-proteins were first discovered outside the nervous system, however, in studies of hormone actions. Martin Rodbell and Alfred G. Gilman are two scientists who first worked the central role of G-proteins in linking receptor molecules to cellular actions.
Search for biographies and scientific contributions of these two scientists
Assignment 7 (Chapter 12)
Search for images illustrating the location of the limbic system and interconnections among its components.
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