Name: Adrenal Glands
Uploaded: 2019-07-19
Duration: 5 min 19 s
Description: The adrenal glands are found atop our kidneys and help regulate our adrenaline and noradrenaline in times of great stress. Let’s learn more in this video!

Question

Describe briefly the structure of the human Brain.

Accepted Answer

It is believed that the human brain has evolved over millions of years from the brains of lower animals, and this evolutionary process still continues. For the convenience of study, the brain can be divided into three parts: Hindbrain, Midbrain and Forebrain.

Forebrain is considered to be the most important part of the brain because it performs all cognitive, emotional, and motor activities. The midbrain is relatively small in size and it connects the hindbrain with the forebrain. A few neural centres related to some special reflexes and visual and auditory sensations are found here. By far the largest region of brain is the forebrain, which contains the entire cerebrum and several structures directly nestled within it - the thalamus, hypothalamus, the pineal gland and the limbic system. The hindbrain is located at the back of the head and looks like an extension of the spinal cord. It contains the medulla, pons, and cerebellum. Medulla Oblongata is the lowest part of the brain that exists in continuation of the spinal cord. It contains neural centres, which regulate basic life supporting activities like breathing, heart rate, and blood pressure. This is why medulla is known as the vital centre of the brain.

Pons is connected with medulla on one side and with the midbrain on the other. A nucleus (neural centre) of pons receives auditory signals relayed by our ears. It is believed that pons is involved in sleep mechanism, particularly the sleep characterised by dreaming. Cerebellum is highly developed part of the hindbrain can be easily recognised by its wrinkled surface. It maintains and controls posture and equilibrium of the body. Thalamus consists of an egg-shaped cluster of neurons situated on the ventral (upper) side of the hypothalamus. It is like a relay station that receives all incoming sensory signals from sense organs and sends them to appropriate parts of the cortex for processing. The Cerebrum also known as Cerebral Cortex, this part regulates all higher levels of cognitive functions, such as attention, perception, learning, memory, language behaviour, reasoning, and problem-solving.

Describe briefly the structure of the human Brain.

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