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 typically begin suddenly, without warning. They can strike at any time â when you're driving a car, at the mall, sound asleep or in the middle of a business meeting. You may have occasional panic attacks or they may occur frequently.ou may feel fatigued and worn out after a panic attack subsides. Panic attacks typically include some of these symptoms: 1  Sense of impending doom or danger. 2  Fear of loss of control or death. 3  Rapid, pounding heart rate. 4  Sweating. 5  Trembling or shaking. 6  Shortness of breath or tightness in your throat.
Panic attacks usually begin abruptly and may reach a peak within 10 to 20 minutes but may continue for hours in some cases. Panic attacks are not dangerous and should not cause any physical harm. The effects of a panic attack vary. Some, notably first-time sufferers, may call for emergency services. Many who experience a panic attack, mostly for the first time, fear that they are having a heart attack or a nervous breakdown.