Circadian Rhythms and Zeitgebers

It is defined as a daily rhythmical change in behavior or physiological process, such rhythms are controlled by mechanism within the organism by internal clock which is a biological clock. In the brain the principal biological clock appears to be located in suprachiasmatic nuclei (SCN) -- a nucleus situated atop the optic chiasm. It contains a biological clock responsible for organizing many of the body circadian rhythms.

Zeitgebers

A stimulus that reset the biological clock responsible for circadian rhythms. In animals Pineal gland controls circadian rhythms.

Biological Basis of Behavior
Aggressive Behavior
"An emotional state consisting felling of hate and desire to inflict harm. Overt response that involves actual or intended destruction of other organisms". OR "A species typical behavior at pattern of movements, biting, striking ets".

Types

Threat Behavior
A behavior which is consisted on postures or jestures that warm the adversely to leave or it will become the target or attack.
Defensive Behavior
A behavior that occures against the threatening situation or behavior.
Submissive Behavior
A behavior which indicate that it accepts defeat and will not challange the other one.
Predated Behavior
Behavior which is consist of an attack of one organism at an individual of another specie on which the attacking animals.

Neural Control of Aggressive Behavior

The activity of brain stem circuits appears to be controlled by hypothalmus and amygadala which have a special influence on a species typical behavior. The activity of these parts of brain is controlled by perceptual system that detect the status of environment including the presence of other behaviors while specifically. The defensive and predators is attached with the pre-aquaductal gray matter (PAG) of midbrain. While as aggressive behavior is along wth the above said part the seretonergic synapes involved in this behavior.

Aggression in Male and Female

Aggression in male and female is controlled by neural circuits that are stimulated by endrogen gland. Androginization has an organization affects. The secretion of theis gland is associated with male and female Sexual behavior. Androgin secrets a hormone testosterm and projesterm which facilitate the Sexual organ and are involved in agression behavior.