GENERAL HISTOLOGY

EXCRETORY SYSTEM

CORTEX

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following statements about the cerebral cortex is true?
A
the larger the area on the somatosensory cortex, the more sensitive the perception
B
the smaller the area on the somatosensory cortex, the more sensitive the perception
C
the larger area on the parietal cortex, the more sensitive the hearing
D
the smaller the area on the partietal cortex, the more sensitive the hearing
Explanation: 

Detailed explanation-1: -Those areas of the body having the greatest tactile sensitivity have the greatest amount of cortical tissue for processing. For example, the hands, lips, and genitalia have disproportionately more cortical representation than do the less sensitive arms and feet.

Detailed explanation-2: -The primary somatosensory cortex is responsible for processing somatic sensations. These sensations arise from receptors positioned throughout the body that are responsible for detecting touch, proprioception (i.e. the position of the body in space), nociception (i.e. pain), and temperature.

Detailed explanation-3: -The somatic sensory cortex in humans, which is located in the parietal lobe, comprises four distinct regions, or fields, known as Brodmann’s areas 3a, 3b, 1, and 2. Although area 3b is generally known as the primary somatic sensory cortex (also called SI), all four areas are involved in processing tactile information.

Detailed explanation-4: -Assessing touch, temperature, position, vibration, pressure and pain information from your body. These functions are processed by an area of your parietal lobe called the somatosensory cortex.

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