Definition of Longitudinal Fissure:

The longitudinal fissure, also known as the interhemispheric fissure, is a prominent groove that divides the brain into two hemispheres, namely the left and right hemispheres.

Function and Importance:

The longitudinal fissure plays a vital role in the structural organization of the brain as it separates the two cerebral hemispheres. This division allows for specialization and coordination of functions between the left and right brain regions.

Anatomy and Location:

The longitudinal fissure is located along the midline of the brain, extending from the front to the back. It begins at the frontal lobe and continues towards the occipital lobe. This deep groove runs perpendicular to the brain’s surface, dividing it into symmetrical halves.

Structure and Characteristics:

The longitudinal fissure is narrow yet deep, creating a deep crevice between the two hemispheres. It extends superiorly and inferiorly, providing ample space for the connecting structures, such as the corpus callosum, which facilitates communication and information transfer between the hemispheres.

Clinical Significance:

The proper development and function of the longitudinal fissure are crucial for normal brain functioning. Any abnormalities or damage to this fissure can lead to various neurological disorders, affecting cognitive, sensory, and motor functions. Conditions like agenesis of the corpus callosum or certain brain tumors can impact the integrity of the longitudinal fissure.