BRAIN

                           BRAIN

             

The brain is divided in following three parts:-

1)Fore brain.

2)Mid brain

3)Hind brain

FORE BRAIN

Fore brain can be divided into two regions:-

1)Telencephalon

2)Diencephalon

TELENCEPHALON:

The largest part of fore brain which is differentiated into two cerebral hemisphere or cerebrum is called telencephalon.

CEREBRUM:-Largest part of brain.

FUNCTION:-Cerebrum is concerned with intellegence memory,learning,reasoning,and overall control of voluntary actions.

It is involve in all conscious activities.

It coordinated different sense together

CEREBRAL HEMISPHERE:--Each hemisphere consist of an outer grey matter or cerebral cortex and an inner white matter.

CEREBRAL CORTEX:-Cerebral cortex is the largest and the most complex part of human brain.

DIENCEPHALON

The diencephalon consist of two parts .

1)Thalamus

2)Limbic system

THALAMUS: The clearing house for sensory impulses is called thalamus.

LIMBIC SYSTEM:It is located between thalamus and cerebrum.

PARTS OF LIMBIC SYSTEM:

i) Hypothalamus      ii)Amygdala     iii)Hippocampus

HYPOTHALAMUS:It is also called thermostate of the body.

                                  It also regulates body temperature,blood pressure,

                                  hunger,thirst,aggression,pleasure and pain.

AMYGDALA:The amygdala produces sensation of pleasure,punishment or sexual arousal stimulation.It also involve in feeling of fear.

  

HIPPOCAMPUS:It is involved in long term memory

MID BRAIN;In mammals mid brain is relatively small.It consist of optic lobes which are represented by four small bodies.

FUNCTION;It receives sensory information like vision odour etc.It receive information from spinal cord and send them to the fore brain.  

HIND BRAIN;Hind brain consist of;

Medulla Oblongata.
Cerebellum.
Pons.
Reticular formation.

Medulla Oblongata;It lies on top of spinal cord

FUNCTIONS;It control voluntary actions like;

Blood pressure 
Heart beat 
Sneezing
Coughing
Breathing rate
Hicupping
Swallowing

Cerebellum;The cerebellum lies dorsally behind the optic lobes .It is highly convoluted .It is large in mammals and other animals.

Pons; Pon regulates activities like muscular co-ordination,facial expression,breathing and sleeping.

Reticular formation.;Reticular formation lies in pons,medulla,and mid brain.