Parietal Lobe

Lobus parietalis is the Latin pronunciation for the Parietal Lobe. The Name is derived from the Parietal bone. The word Paries means Wall. Parietal Lobe is the part of the brain which is situated superior to Occipital Lobe and posterior to Frontal Lobe. It transmits information from different stimulus mainly the spatial sense and Navigation. Several portion of it are also important for processing languages.

Laterally

Parietal Lobe

ANATOMY

There are three anatomical boundaries for Parietal Lobe which are as follows.

Central Sulcus; this separates the Parietal Lobe from the Frontal Lobe.
Parieto-Occipital Sulcus; separates Parietal Lobe from the Occipital Lobe.
Lateral Sulcus; also known as Sylvian Fissure separates the Parietal Lobe from the Temporal Lobe.

Posterior of the Central Sulcus and the anterior of Parietal Lobe is primary Somatosensory Cortical Area. Postcentral Sulcus further divides it.

FUNCTION

Parietal Lobe helps in organizing the information like knowledge of numbers and their relation and processing information relating to sense of touch. Some of its parts are also involved in Visual Spatial processing. Posterior Parietal Cortex is considered as dorsal stem for Vision. Posterior Parietal Cortex (PPC) after receiving visual input give signals through Motor signals allowing the control movements of arms, hands and eyes.

The lobe is divided into two Hemispheres Left and Right. The Left hemisphere is involved for symbolic functions of language and mathematics whereas the Right Hemisphere is involved for carrying out the images and shapes of maps i.e. spatial relationship.

CLINICAL SIGNIFICANCE

Damage to the Right Hemisphere of the Parietal Lobe, results in the loss of imagery, spatial relationship also neglect to the left side of face and body.

Damage to the Left Hemisphere; results in problems of mathematics, long reading, writing and understanding of symbols.

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