Ventricular tachycardia. Ventricular tachycardia (V-tach or VT) is a type of regular and fast heart rate that arises from improper electrical activity in the ventricles of the heart. Although a few seconds may not result in problems, longer periods are dangerous. Short periods may occur without symptoms or present with lightheadedness, palpitations, or chest pain.
The midbrain tegmentum contains thousands of neurons that are responsible for a variety of many functions, two of which include the control of movement and sensory systems. See also
Tectospinal tract The tectospinal tract is believed to play a role in modulating head movements in response to visual and auditory stimuli. Originating from neurons deep within the superior colliculus, the axons in the tectospinal tract cross via the dorsal tegmental decussation, project to the spinal cord, and terminate in the upper cervical spinal levels.