QS Study

Frontal Lobe of Cerebral Cortex

The frontal lobe is part of the brain’s cerebral cortex. The frontal lobe of the brain is essential to our consciousness, as well as functions that appear exceptionally human, such as spoken language. It is located at the front of the brain and is associated with reasoning, motor skills, higher level cognition, and expressive language. It is also where our behavior is formed and where we can carry out privileged mental processes such as planning.

Boundary of the frontal lobe of the cerebral cortex

  • Behind – by the central sulcus on the superolateral surface.
  • Above – by the superomedial border.
  • Below – by the superciliary border and first 2.5 cm of the posterior ramus of lateral sulcus.
  • Infront – In the frontal pole.

Frontal Lobe of Cerebral Cortex 1

Fig: Frontal Lobe border of Cerebral Cortex

Sulci and gyri of the frontal lobe –

(A) In superolateral surface: The lateral surface is curved, conforming to the inner surface of the frontal and parietal bones. It is divided into four gyri, which in reality are more ‘regions’ than true gyri, in that each is convoluted and divided by smaller incomplete sulci.

(B) In orbital surface:

Sulci:

  1. Olfactory sulcus.
  2. Orbital sulcus (H-shaped).

Gyrus:

  1. Gyms rectus
  2. Orbital gyrus (anterior, posterior, medial, lateral).

Functional Areas: Carries out higher mental processes such as thinking, decision making, and planning. The right frontal lobe controls activity on the left side of the body and the left frontal lobe controls activity on the right side.

  • Speech and language production: Broca’s area, a region in the frontal lobe, helps put thoughts into words.
  • Some motor skills: It helps coordinate voluntary movements, including walking and running.
  • Comparing objects: It helps to categorize and classify objects, in addition to distinguishing one item from another.
  • Forming memories: Virtually every brain region plays a role in memory, so the frontal lobe is not unique.
  • Understanding and reacting to the feelings of others: The frontal lobe is vital for empathy.
  • Reward-seeking behavior and motivation: Most of the brain’s dopamine-sensitive neurons are in the frontal lobe.
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