QS Study

Occipital Lobe of Cerebral Cortex

The occipital lobe is important to be able to correctly understand what your eyes are seeing. They are positioned at the posterior region of the cerebral cortex and are the main centers for visual processing.

Boundaries – It sits posterior to the temporal lobe and parietal lobes, underlying the occipital bone and overlying the tentorium cerebelli.

  • Superiorly – by the superomedial border.
  • Inferiorly – by the inferolateral borders.
  • Anteriorly – by the parieto-occipital sulcus and a line drawn from it to the preoccipital notch.
  • Posteriorly – It ends in the occipital pole.

Functional areas present in occipital lobe – Responsible for processing visual information from the eyes. This area receives information from the visual fields and is associated with visual processing.

They are involved in several functions of the body including:

  • Visual Perception
  • Color Recognition
  • Reading
  • Reading Comprehension
  • Depth Perception
  • Recognition of Object Movement.

Occipital Lobe of Cerebral Cortex 1

Fig: Occipital Lobe of Cerebral Cortex

Effects of the lesion in the primary visual area (Brodmann’s are 17)

  1. Crossed homonymous hemianopia: When the lesions involve the walls of posterior part of one calcarine sulcus.
  2. Inferior quadrantic hemianopia: When the area above the calcarine sulcus is involved.
  3. Superior quadrantic hemianopia: When lesions involve the area below the calcarine sulcus.
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