Question

Hand-eye coordination, integration of visual and somatosensory information, and spatial awareness are mainly functions of which lobe of the cerebral cortex?

• A. Parietal lobe
• B. Frontal lobe
• C. Occipital lobe
• D. Temporal lobe

Hint:

Which lobe houses somatosensory cortex and posterior visuospatial association areas?

Answer 1

The Correct Option is A

Step 1: Understand the functional question.
Hand-eye coordination requires the brain to combine incoming visual information with proprioceptive/somatosensory information about limb position and to construct a spatial map of the body in relation to objects. The lobe that integrates these multiple sensory streams is the key.

Step 2: Localise the function.
The parietal lobe contains the primary somatosensory cortex (postcentral gyrus) and large posterior parietal association areas. The posterior parietal cortex integrates visual and somatosensory inputs to guide reaching, grasping and visually-directed movement, and mediates spatial awareness. Hence hand-eye coordination is principally a parietal function.

Step 3: Why the other options are wrong.
The frontal lobe executes motor commands (primary motor cortex) and higher executive control but is not the main integrator of visuospatial input. The occipital lobe processes primary vision only. The temporal lobe handles hearing, memory and object recognition (the "what" stream), not visuomotor spatial guidance.

Key fact: The posterior parietal cortex integrates visual and somatosensory data for hand-eye coordination and spatial awareness; lesions here cause apraxia and neglect.