Question

Each cerebral hemisphere is divided into frontal and parietal lobes by:

a. the oblique sulcus
b. the longitudinal fissure
c. the central sulcus
d. none of the above

Answer 1

c. the central sulcus

Step-by-step explanation:

• The cerebral hemisphere has a highly convoluted and is characterized by the presence of several folds called gyri and groove called sulci.
• These gyri and sulci allow the cortical surface area to expand.
• The lateral surface of the cerebral hemisphere is characterized by the presence of two major sulci- the lateral fissure (of Sylvian) and the central sulci (of Rolando).
• The central sulcus (Sulcus of Rolando) is the one that is responsible for separating the frontal lobe from the parietal lobe.
• The central sulcus runs from the superior margin of the hemisphere near its midpoint obliquely downward and continues forward to meet the lateral fissure.

Answer 2

The central sulcus.

Step-by-step explanation:

Central sulcus are the folds present in the cerebral cortex of the brain. The central sulcus is also known as central fissure and was discovered by Luigi Rolando.

The main function of central sulcus is the division of cerebral hemisphere into the parietal lobes and the frontal lobes. The central sulcus also separates the primary somatosensory cortex from the primary motor cortex.

Thus, the correct answer is option (c).