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2006-08-29 07:06:11 · 5 answers · asked by blk_female_x 2 in Science & Mathematics Biology

only want the 3 major parts..thanks.

2006-08-29 11:11:24 · update #1

5 answers

I think you mean the cerebellum, the cerebrum, and the medulla oblongata, but there are many others, such as the circle of Willis.

2006-08-29 07:21:32 · answer #1 · answered by cross-stitch kelly 7 · 0 0

The Cerebrum: The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action.
The Cerebellum: The cerebellum, or "little brain", is similar to the cerebrum in that it has two hemispheres and has a highly folded surface or cortex. This structure is associated with regulation and coordination of movement, posture, and balance.
Limbic System: The limbic system, often referred to as the "emotional brain", is found buried within the cerebrum. Like the cerebellum, evolutionarily the structure is rather old.

2006-08-29 14:13:17 · answer #2 · answered by ohno 1 · 0 0

Thus the human brain consists of roughly three separate parts.

The first segment in the lower section, sometimes called the brain stem, consisting of structures such as the medulla (controlling breathing, heart rate and digestion) and the cerebellum (coordinating senses and muscle movement). Much of these features are inherited "as is" from the reptilian brain.
The second segment appears as a slight swelling in lower vertebrates and enlarges in the higher primates and ourselves into the midbrain. The structures contained here link the lower brain stem to the thalamus (for information relay) and to the hypothalamus (which is instrumental in regulating drives and actions). The latter is part of the limbic system.
The limbic system, essentially alike in all mammals, lies above the brain stem and under the cortex and consists of a number of interconnected structures. Researchers have linked these structures to hormones, drives, temperature control, emotion, and one part, the hippocampus to memory formation. Neurons affecting heart rate and respiration appear concentrated in the hypothalamus and direct most of the physiological changes that accompany strong emotion. Aggressive behavior is linked to the action of the amygdala, which lies next to the hippocampus. The latter plays a crucial role in processing various forms of information as part of our long term memory. Damage to the hippocampus will produce global retrograde amnesia, or the inability to lay down new stores of information.

As we have seen, much of the lower and mid brain are relatively simple systems which are capable of registering experiences and regulating behavior largely outside of any conscious awareness (we don't have to think to remember to breathe!). In a sense, the human brain is like an archeological site with the outer layer composed of the most recent brain structure, and the deeper layers consisting of structures from our shared evolutionary history with the reptiles and mammals.

Finally, the third section, the forebrain appears as a mere bump in the brain of the frog but balloons into the cerebrum of higher life forms and covers the brain stem like the head of a mushroom. It has further evolved in humans into the walnut-like configuration of left and right hemispheres. The highly convoluted surface of the hemispheres - the cortex - is about two millimeters thick and has a total surface area of about 1.5 square-meters (the size of a desktop).
The structure of the cortex is extremely complicated. It is here that most of the "high-level" functions associated to the mind are implemented. Some of its regions are highly specialized - for example, the occipital lobes located near the rear of the brain are associated with the visual system. The motor cortex helps coordinate all voluntary muscle movements.

2006-08-29 14:13:28 · answer #3 · answered by S. 2 · 1 0

There are many including:
THE SOMATIC NERVOUS SYSTEM
SYMPATHETIC NERVOUS SYSTEM,
PARASYMPATHETIC NERVOUS SYSTEM

There is a site that will shed some light on the questions you have. Check it out.....

2006-08-29 14:29:53 · answer #4 · answered by Virtuous 3 · 0 0

frontal lobe, cerebral cortex, and......?

2006-08-29 14:10:13 · answer #5 · answered by mazzie 2 · 0 0

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