This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: 8-115. Explain what is meant by the term motor homunculus. What will be an ideal ... (Read 92 times)

lidoalex

  • Hero Member
  • *****
  • Posts: 538
on: Jun 22, 2018
8-115. Explain what is meant by the term motor homunculus.
 
  What will be an ideal response?

Question 2

Describe and give an example of (a) flexion and (b) extension of a limb produced by muscles.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

LP

  • Sr. Member
  • ****
  • Posts: 302
Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: The primary motor cortex lies just before the central sulcus on each hemisphere. The motor cortex is organized in a topical fashion such that activation of certain patches of cortex results in movements of particular parts of the body. The homunculus is a cartoon representation of the topical organization of the motor cortex. In effect, it resembles an upside down person with the legs over the top of the cortex and the face at the bottom of the motor strip.

Answer to Question 2

Answer: Contraction of a flexor muscle produces flexion, which draws in a limb toward the body. Contraction of an extensor muscle moves a limb out from the body (antigravity action). A four-legged animal lifts its paw by contracting the flexors and places the paw back down by contracting the extensors.


lidoalex

  • Member
  • Posts: 538
Reply 2 on: Jun 22, 2018
:D TYSM

bulacsom

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

The relative proportions of body region representation in the motor cortex (anterior to the central The relative proportions of body region representation in the motor cortex (anterior to the central
Regions of the Primary Motor Cortex and Associated Axons of the Corpus Callosum Regions of the Primary Motor Cortex and Associated Axons of the Corpus Callosum
The Number of Children Americans Think Are Ideal The Number of Children Americans Think Are Ideal
Primary motor area of cerebral cortex Primary motor area of cerebral cortex
If CP for an ideal gas is 35.4 J/molK, which of the following is CV for this gas? If CP for an ideal gas is 35.4 J/molK, which of the following is CV for this gas?
Simplified Motor Score Simplified Motor Score
Video: Introduction to Pre-eclampsia

For a complete list of videos, visit our video library