Question

The parietal and temporal lobes are separated by
A. Central sulcus
B. Longitudinal fissure
C. Lateral sulcus
D. Parieto-occipital sulcus

Answer 1

Hint: In the brain of mammals, among the four major lobes in the cerebral cortex, the parietal lobe is one of them. Its position lies behind the central sulcus, frontal lobe, and above the temporal lobe.

Complete answer: The parietal lobe integrates sensory information among various modalities, including spatial sense and navigation, the main sensory receptive area for the sense of touch in the somatosensory cortex which is in the postcentral gyrus that is posterior to the central sulcus, and the visual system in the dorsal stream. Touch, temperature, and pain receptors are major sensory input receptors that relay through the thalamus to the parietal lobe. Three anatomical boundaries in which the central lobe separates the parietal lobe from the frontal lobe by central sulcus; separates the parietal and occipital lobes by the parieto-occipital sulcus. The lateral sulcus is the most lateral boundary formed in the central lobe, that separates the temporal lobe and the two hemispheres are formed by dividing the central lobe. The skin area on the contralateral surface of the body within each area of the hemisphere is represented by the somatosensory cortex.
Hence, the correct answer is option C.

Note: The posterior parietal cortex can be subdivided into the superior parietal lobule and the inferior parietal lobule separated by the intraparietal sulcus (IPS). The intraparietal sulcus and adjacent gyri are essential in the guidance of limb and eye movement. Integrating sensory information from various parts of the body, relations with knowledge of members, and the manipulation of objects are the main important functions of the parietal lobe.