Which parts of the body have the largest representation in the motor cortex which have the smallest?

Which parts of the body have the largest representation in the motor cortex which have the smallest?

The arm and hand motor area is the largest, and occupies the part of precentral gyrus between the leg and face area. These areas are not proportional to their size in the body with the lips, face parts, and hands represented by particularly large areas.

Which part of the body has the largest representation in the somatosensory map?

Why is this? The reason is the brain maps each sensory receptor onto the cortex rather than considering the area of the body where the sensor is located. The more receptors there are in a given area of skin, the larger that area’s map will be represented on the surface of the cortex.

What part of the brain is the primary motor area?

The primary motor cortex, or M1, is located on the precentral gyrus and on the anterior paracentral lobule on the medial surface of the brain. Of the three motor cortex areas, stimulation of the primary motor cortex requires the least amount of electrical current to elicit a movement.

Which of the following body parts is associated with the greatest amount of brain tissue surface area in the somatosensory cortex?

psych chapter 2

Question	Answer
Which of the following body parts is associated with the greatest amount of brain tissue in the sensory cortex?	lips.
One function of glial cells is to	provide nutrients to interneurons.
An allornone response pattern is characteristic of the	initiation of neural impulses.

What are the largest parts of the motor homunculus?

The largest parts of motor homunculi are the lips, tongue, and TOES. The primary visual cortex is in the FRONTAL lobe of each cerebral hemisphere.

Does each part of the body have the same degree of representation on the motor cortex?

-Each part of the body has the same degree of representation on the primary motor cortex. Each part of the body has the same degree of representation on the primary motor cortex. the area in the somatosensory cortex that once received input for the missing index finger is now receiving input from the adjacent fingers.

Which body region has the greatest representation in the somatosensory cortex?

parietal lobe
postcentral gyrus: A prominent structure in the parietal lobe of the human brain and an important landmark that is the location of the primary somatosensory cortex, the main sensory receptive area for the sense of touch.

Which body parts have the largest representation in the somatosensory homunculus quizlet?

– the distorted figure of the sensory homunculus mapped onto the primary somatosensory cortex represents the relative importance and distribution of touch in various areas of the body, rather than the actual size of the body part. The thumb, fingers, and face represent proportionately the largest areas.

Which of the following body parts is associated with the greatest amount?

Chapter 2

Term	Definition
Which of the following body parts is associated with the greatest amount of brain tissue in the sensory cortex?	lips
The chemical messengers released into the spatial junctions between neurons are called?	Neurotransmitters

What parts of the body have the greatest amount of cortex devoted to them?

skin
This is because the amount of primary somatosensory cortex is directly related to the sensitivity of a body area and the density of receptors found in different parts of the body. The areas of skin with the higher density of receptors (like the face, hands and fingers) have more cortical tissue devoted to them.

What does the homunculus represent?

The word “homunculus” means little man in Latin. But in neuroanatomy, the cortical homunculus represents either the motor or the sensory distribution along the cerebral cortex of the brain.

What does cortical homunculus represent?

The cortical homunculus is an illustration that represents how the brain senses and controls different parts of body.