How is the insular lobe involved in taste and internal body sensations?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Diagram comparing action potential conduction in myelinated and unmyelinated axons, showing a neuron with labeled cell body, myelin sheath, nodes of Ranvier, and the flow of electrical signals along each type of axon. — nervous system In a myelinated axon, the myelin sheath prevents the local current (small black arrows) from flowing across the membrane. This forces the current to travel down the nerve fibre to the unmyelinated nodes of Ranvier, which have a high concentration of ion channels. Upon stimulation, these ion channels propagate the action potential (large green arrows) to the next node. Thus, the action potential jumps along the fibre as it is regenerated at each node, a process called saltatory conduction. In an unmyelinated axon, the action potential is propagated along the entire membrane, fading as it diffuses back through the membrane to the original depolarized region.

The insular lobe, also known as the central lobe, is an invaginated triangular area located deep within the lateral sulcus, hidden from the surface of the cerebrum by the frontal, parietal, and temporal lobes.1

Regarding its physiological roles, the insular lobe is understood to be involved in the perception of taste as well as the processing of sensory and motor visceral functions. These visceral functions relate to internal body sensations, reflecting the lobe's role in integrating information from the body's internal environment.1