Telencephalon, Diencephalon, Mesencephalon, Metencephalon and Myencephalon Free Essay Example, 1000 words

The mesencephalon is the portion of the brain stem that connects the forebrain and the hindbrain because it is located between these two parts of the brain. Its functions include pupil dilation, eye, and body movement, hearing and controlling responses to sight. The mesencephalon consists of the tegmentum and the tectum. The tectum is the upper surface of the midbrain. This is structure is composed of two parts which appear like small bumps namely inferior colliculi and superior colliculi. The superior colliculi are part of the visual system and thus it has a visual function while the inferior colliculi are part of the auditory system and thus it has an auditory function. The function of the tectum in man, therefore, relates to a reaction to moving stimuli and visual reflexes (Pinel, 2009). The tegmentum is located below the rectum and it has tracks of passage, reticular formation and three colorful structures namely the substantia nigra, the periaqueductal gray and the red nucleus. The function of the tegmentum is to receive sensory information. It is also involved in arousal, sleep, attention, maintenance of muscle tone, movement and vital reflexes like respiratory, cardiac and circulatory reflexes. The diencephalon is located between the cerebral hemispheres and is the second biggest division or structure of the brain. We will write a custom essay sample on Telencephalon, Diencephalon, Mesencephalon, Metencephalon and Myencephalon or any topic specifically for you Only $17.96 $11.86/page