UNIT 4 NOTES:

The Nervous System:

It starts with an individual nerve cell called a NEURON.

Neurotransmitters: chemical messengers released by terminal buttons through the synapse. 

Types of Transmitters:

1. Acetylcholine (ACH): deals with motor movement and memory.
2. Dopamine: deals with motor movement and alertness.
3. Serotonin: involved in mood control.
4. Endorphins: involved in pain control.

Types of Neurons:

1. Sensory Neuron: Take information from the senses to the brain.
2. Inter Neuron: Take messages from sensory neurons to other parts of the brain or to motor neurons.
3. Motor Neuron: Take information from brain to the rest of the body.

The cerebral cortex is made up of four lobes:

1. Frontal Lobe: 

• Abstract thought and emotional control
• contains motor cortex
• contains broca's area

2. Parietal Lobe:

• contain sensory cortex
• most of the parietal lobes are made up of association areas

3. Occipital Lobe: 

• deals with vision
• contains visual cortex

4. Temporal Lobe: 

• process sound sensed by our ears
• contains wernike's area
• wenicke's aphasia: unable to understand language