Essay on The Five Major Structure of the Brain

865 Words4 Pages
The Five Major Structures of the Human Brain

University of Phoenix

PSY 240

October 27, 2012

Olivia Fransis

The human brain is nothing short of incredible. In a way it’s the world’s most powerful computer because it can process tasks at lightning speeds and simultaneously be in control of our reflexes and every other voluntary and involuntary functions. It is the most important and complex organ as well as our core for learning
At the point of birth, the brain weighs an average of 350 to 400 grams and can weigh from about 1,300 to 1,400 grams as an adult. The brain is composed up of roughly 77 to 78% of water, 10 to 12% lipids, 8% proteins, 1% carbs, 2% soluble organics, and 1% inorganic salt. The brain can actually grow as
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The telencephalon is at the front of the brain and is made up of the basil ganglia, the cerebral cortex, the olfactory bulb, and the corpus striatum. The functions of the telencephalon include: determining intelligence, personality, sense of smell, sense of touch, sensory impulse interpretations, organization and planning.
The diencephalon is located in between the cerebral hemispheres and is greater than the midbrain. It is composed of the thalamus and hypothalamus structures. The thalamus acts as a relay point for nerve impulses that are inbound from around the body that are then dispatched to the appropriate area of the brain for processing. The hypothalamus controls hormone secretions produced from the pituitary gland. These hormones control growth and instinctual behaviors such as eating, drinking, sex, anger, and reproduction. The hypothalamus also controls when a new mother begins to lactate. Some of the functions of the diencephalon include: sensing impulses moving throughout the body, controlling autonomic functions, endocrine functions, motor functions, homeostasis and basic senses such as hearing, vision, smell, and taste.
The cerebrum is the bigger portion of the brain and it consists of 85% of the overall weight of the brain. It has a unique outer surface with deep wrinkles, which is the cerebral cortex that consists of “gray matter”. The cerebrum is what makes the human brain as powerful as it is. Unlike
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