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Parts of The Brain | Psychology Brain Functions

Psychology
Typography

Hind Brain:

  • Lowest part of the brain, located at the rear base of skull.
  • Primary responsibilities is to perform routine house keeping.
  • Hind Brain has further Three main parts.

Medulla:

  • Just above the top of the spinal cord where it enters the brain.
  • Controls involuntary action like breathing heartbeat, respiration, peristalsis of the gut.

Lowest part of the brain, located at the rear base of skull.

Pons:

  • Just above medulla concerned with balance, coordinating muscles and hearing.

Cerebellum:

  • Its is located above the medulla and behind the pons.
  • It controls body balance so that we ca walk a straight line, (usually drugs depress its activity).
  • Also play an important role in intellectual functions, analysis and coordination of sensory information and problem solving.

Mid Brain:

  • The mid brain concerned with senses especially with eye.
  • It is also related / concerned with Automatic movement of the eyes on a moving object.
  • The mid brain is also connected with the orientation of head to ensure sound clarity.

Regular Formation:

  • The mid brain also sends “alert” signals to higher and specialized centers of the brain in response to incoming messages.
  • Mid brain activate other parts of the brain to produce general body awareness to determine where the response is necessary.
  • During sleep it tries to avoid and filter out stimuli to allow us to sleep undisturbed.

Forebrain | Cognition | Motivation | Emotions | Action.

  • Largest part of the brain.
  • Structurally it consists of two distinct areas.
  • In area one there is..
  • a.Thalamus.
  • b.Hypothalamus.
  • c.Limbic system.
  • d.Amugdalla:
  • e.Preasure Cebters:
  • f.Hippocampus:
  • In area two there is only..
  • Cerebral Cortex:

forebrain is the Largest Part of the Brain.

Thalamus:

  • Switching station for messages going to and from the brain.
  • Routes incoming stimuli from the sense organs to the appropriate parts of the brain.
  • Links upper and lower centers of the brain.
  • Also plays a role in preliminary processing of sensory info.

Hypothalamus:

  • Located just below the thalamus size of a finger tip.
  • Most important function is homeostasis the keeping of a steady internal environment.
  • ---- > regulation of body temperature.
  • ---- > osmotic pressure in blood.
  • ---- > appetite and emotions related to se.
  • Vital look between the brain and endocrine system.

Limbic System

  • Some of the pleasure areas are in the limbic system.
  • Doughnut shaped structures amygdale and hippo campus.
  • Basic functions are.
  • Eating.
  • Aggression.
  • Reproduction.
  • Emotions, learning, memory.

Amygdalla:

  • Plays a key role in aggression as well as processing information about stimuli.
  • Injury to amygdalla in animals can turn them into very wild sauages, conversely animals that are wild can become meek and obedient.

Pleasure Centers:

  • Research on rats has concluded that when filled with electrodes implanted in their head, they would pvers it again and again to receive pleasurable electric stimulation.
  • Even when they are on the way to food.
  • In humans too the experience has been reported to be immensely pleasurable, similar to some respects to sexual orgasam.
  • Some rats would actually stimulate themselves literally thousands of time an hours until they collapsed with fatigue.

Hippocampus.

  • Involved in the formation of new memories for example a patient whose hippo campus is damaged might be able to talk to other persons but even a few minutes later he would be unable to recall what had been discussed.
  • Also involved in processing emotions related information and comparing it to the stored information.

Cerebral Cortex.

  • Largest structure in forebrain.
  • This is what makes us humans.
  • Involved in all voluntary actions language and intelligence.
  • Involved in human ability to think evaluate and make difficult judgments.
  • Contains a lot of grey matters (cell bodies of neurons).


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