Brain Response of Behavior

Topics: Neuron, Action potential, Dopamine Pages: 1 (352 words) Published: April 15, 2010
Neurons are cells which spread throughout the body and their highest percentage can be found in the brain. There are about 10,000billion are more neurons in the human brain. These cells are designed to communicate to the other cells through what is known as the synapse to carry out different functions or signals to the body. A chemical message from other neurons known as dendrites causes a nerve impulse. The chemicals that are in the neurons are called neurotransmitters and it is done through electrochemical process which is released at the end of the axon in the synaptic cleft through vesicles. After this process, the neurotransmitters combine to the receptor sit of the receiving neuron for the progress that sends the message to the presynaptic neuron and the postsynaptic neuron is the one that receive it and than releases to a particular part of the body. Each neurotransmitter has a specific function as well as a specific effect on the circuit of the brain. Some of the common neurotransmitters are listed below:

1.Acetylcholine (Ach) - Activates motor neurons controlling skeletal muscles. This kind of neurotransmitter contributes to the regulation of attention, arousal, enhance energy, and memory and some Ach receptors stimulated by nicotine. 2.Dopamine (DA) - Contributes to control of voluntary movement, pleasurable emotions, alertness, motivation, immune function, weight gain and loss. It also decreases levels associated with Parkinson disease and cocaine and amphetamines elevate activity at DA synapses 3.Nor epinephrine (NE) – Contributes to modulation of mood, arousal, increase physical energy, increase heart rate, memory/learning and increase blood pressure. Cocaine and amphetamines elevate activity at NE synapses. 4.Serotonin – Involved in regulation of sleep and wakefulness, eating, aggression and abnormal levels may contribute to decrease sexual desire, decrease anxiety, and reduce depression and obsessive compulsive disorder. Prozac and similar...
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