1 Gray matter located on the surface of the brain is called cortex (e.g., cortex of the cerebral hemispheres, cortex of the cerebellum). 2  Masses of gray matter located deeper in the brain are called nuclei .(e.g., brainstem nuclei, nuclei of the thalamus).yramidal cells are the efferent (long-axon) cells of the cerebral cortex. The name refers to the shape of the cell body as seen in standard sections perpendicular to the cortical surface. The apex of the pyramid points toward the cortical surface.
Panic attacks are periods of intense fear or apprehension of sudden onset accompanied by at least four or more bodily or cognitive symptoms (such as heart palpitations, dizziness, shortness of breath, or feelings of unreality) and of variable duration from minutes to hours.anic attacks are periods of intense fear or apprehension of sudden onset accompanied by at least four or more bodily or cognitive symptoms (such as heart palpitations, dizziness, shortness of breath, or feelings of unreality) and of variable duration from minutes to hours.
Panic attacks are frightening but fortunately physically harmless episodes. They can occur at random or after a person is exposed to various events that may trigger a panic attack. They peak in intensity very rapidly and go away with or without medical help.