Ch 10: The Corticospinal Tract & Internal Capsule


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This photo shows a nurse taking a woman’s blood pressure with a blood pressure cuff. The nurse is pumping the cuff with her right hand and holding a stethoscope on the patient’s arm with her left hand.
A proficiency in anatomy and physiology is fundamental to any career in the health professions. (credit: Bryan Mason/flickr)

Chapter objectives

After studying this chapter, you will be able to:

  • Distinguish between anatomy and physiology, and identify several branches of each
  • Describe the structure of the body, from simplest to most complex, in terms of the six levels of organization
  • Identify the functional characteristics of human life
  • Identify the four requirements for human survival
  • Define homeostasis and explain its importance to normal human functioning
  • Use appropriate anatomical terminology to identify key body structures, body regions, and directions in the body
  • Compare and contrast at least four medical imagining techniques in terms of their function and use in medicine

Though you may approach a course in anatomy and physiology strictly as a requirement for your field of study, the knowledge you gain in this course will serve you well in many aspects of your life. An understanding of anatomy and physiology is not only fundamental to any career in the health professions, but it can also benefit your own health. Familiarity with the human body can help you make healthful choices and prompt you to take appropriate action when signs of illness arise. Your knowledge in this field will help you understand news about nutrition, medications, medical devices, and procedures and help you understand genetic or infectious diseases. At some point, everyone will have a problem with some aspect of his or her body and your knowledge can help you to be a better parent, spouse, partner, friend, colleague, or caregiver.

This chapter begins with an overview of anatomy and physiology and a preview of the body regions and functions. It then covers the characteristics of life and how the body works to maintain stable conditions. It introduces a set of standard terms for body structures and for planes and positions in the body that will serve as a foundation for more comprehensive information covered later in the text. It ends with examples of medical imaging used to see inside the living body.

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Ch 10: The Corticospinal Tract & Internal
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8 Pages
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Educational Materials

Sample Questions from the Ch 10: The Corticospinal Tract & Internal Capsule Quiz

Question: A lesion placed in which the following would have the most devastating clinical effects to the patient?


The precentral gyrus of the cerebral cortex.

The anterior limb of the internal capsule.

The posterior limb of the internal capsule.

The anterolateral system.

The postcentral gyrus of the cerebral cortex.

Question: The role of the corpus callosum can best be defined as


Association cortical connections from all areas.

Intracortical connections between homotopic areas of each hemisphere.

A dorsal extension of the internal capsule.

A pathway for interhemispheric transfer from the nondominant to the dominant hemisphere.

A pathway to insure that the same information goes to each hemisphere.

Question: All of the following are sensory radiations from this structure EXCEPT:


Olfactory radiations.

Optic radiations.

Auditory radiations.

Somatosensory radiations.

Question: Which limb of the internal capsule contains cortical afferents?


Anterior limb.

Posterior limb.



Question: What deficit(s) result from interrupting these neurons in area 4?





Pathological reflexes.

All of the above.

Question: Cortical afferents in the internal capsule have their cell bodies located in:


The dorsal horn.

The dorsal column nuclei.

The thalamic nuclei.

The cerebral cortex.

Question: These cells, whose axons terminate directly on skeletal muscle fibers are also known as 'lower motor neurons.'




Question: Which of the following is not correct?


The center for lateral gaze is in the pons.

The center for vertical gaze is in the pretectal area.

Looking upward is not dependent on the mlf.

Looking upward is not dependent on the pons.

The lateral and vertical gaze centers are located near each other in the pons.

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Disclaimer:  This course does NOT provide the education or experience needed for the diagnosing or treating any medical condition, all site contents are provided as general information only and should not be taken as a medical advice.
Source:  Stephen C. Voron, M.D., Suzanne S. Stensaas, Ph.D. , Department of Neurobiology and Anatomy, University of Utah, School of Medicine, Salt Lake City, Utah 84132,
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