Where is the primary visual cortex located and what is its Brodmann area?

Where is the primary visual cortex located and what is its Brodmann area?

• A. In the occipital lobe along the calcarine fissure; Brodmann area 17.
• B. In the temporal lobe near the fusiform gyrus; area 37.
• C. In the parietal lobe near the postcentral gyrus; area 3.
• D. In the frontal lobe near the precentral sulcus; area 4.

Answer: (A)

The primary visual cortex is in the occipital lobe along the calcarine fissure, and it is Brodmann area 17. This region, known as V1, is the first cortical station for visual information received from the eyes via the lateral geniculate nucleus and the optic radiations. It has a retinotopic organization, so different parts of the visual field map systematically onto its surface. Describing it this way fits the best because this specific location and Brodmann designation identify the initial cortical processing of vision. The other descriptions align with different brain areas and functions: a region near the fusiform gyrus in the temporal lobe (area 37) is involved in higher-level visual processing like complex object recognition; a region near the postcentral gyrus in the parietal lobe (area 3) is the primary somatosensory cortex; and a region near the precentral sulcus in the frontal lobe (area 4) is the primary motor cortex.

The primary visual cortex is in the occipital lobe along the calcarine fissure, and it is Brodmann area 17. This region, known as V1, is the first cortical station for visual information received from the eyes via the lateral geniculate nucleus and the optic radiations. It has a retinotopic organization, so different parts of the visual field map systematically onto its surface.

Describing it this way fits the best because this specific location and Brodmann designation identify the initial cortical processing of vision. The other descriptions align with different brain areas and functions: a region near the fusiform gyrus in the temporal lobe (area 37) is involved in higher-level visual processing like complex object recognition; a region near the postcentral gyrus in the parietal lobe (area 3) is the primary somatosensory cortex; and a region near the precentral sulcus in the frontal lobe (area 4) is the primary motor cortex.