The brain devotes more tissue within the ________ for body areas that are highly sensitive to touch such as the lips.

2 answers:

7 0

The part of the brain which contains more neurons compared to other parts as it receives signals or sensory inputs that are highly sensitive is called the somatosensory cortex.

Further Explanation:

The somatosensory cortex is also named as somatic sensory area and somesthetic area. It is located in the parietal lobe and forms parts of the forebrain. It is responsible for processing sensations such as pain, vibrations, and touch so as to initiate movements related to them.

The neurons are extended throughout the body and are cells specialized in the transmission of information within the body. The sensory inputs are received by the somatosensory cortex through the neurons present within the cortex. Neurons first sense the feelings which might be related to visual, auditory or pain stimuli and then send this information to the somatosensory cortex for further processing.

The somatosensory cortex has two areas, primary (S1) and secondary somatosensory area (S2). The primary somatosensory area or S1 is situated on the postcentral gyrus while the S2 is located on the posterior part of the lateral fissure in the superior limb. The contralateral half of the body transfers fiber signals to the nuclei of thalamus in the form of trigeminal, spinal and medial lemnisci. The ventral posterior medial and the ventral posterior lateral part of the nuclei of the thalamus sends projection fibers to the primary somatosensory area. The termination of the efferent fibers occurs at the somesthetic association area.

The S2 gathers bilateral fibers from all parts of the body. Due to the lack of information about the neural connection of S2, it is believed that they receive fibers from the S1.

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Answer Details:

Grade: High School

Chapter: The Somatosensory Cortex

Subject: Biology

Keywords:

The somatosensory cortex, somatic sensory area, somesthetic area, parietal lobe, forebrain, pain, vibrations, touch, sensory inputs, neurons, primary somatosensory area, secondary somatosensory area.

Oksi-84 [34.3K]3 years ago

3 0

The answer to this question would be somatosensory cortex.
The amount of area that was brain dedicated for an organ is not same as their size. Hands area is bigger than feet. That was because of hand much more sensitive than feet. More sensitive means that there are more nervous per inch area. The nerve distribution density will affects the brain area more than the total surface area.

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