The nervous system

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The nervous system by Mind Map: The nervous system

1. Individual cells

1.1. Nerve cells/neurons

1.1.1. Unipolar

1.1.1.1. Simplest, single process

1.1.2. Bipolar

1.1.2.1. Oval soma, gives rise to two processes, dendrites recieve and axon transmits

1.1.2.2. Multipolar

1.1.2.2.1. Single axon, many dendrites. Most comon type of neuron in mammals.

1.1.3. Pseudopolar

1.1.3.1. Variants of bipolar, initially bipolar, the two segments function as axons

1.1.4. Four regions of neuron

1.1.4.1. Cell body or soma

1.1.4.2. Dendrites

1.1.4.3. Axon

1.1.4.4. Synapse

1.1.4.4.1. Presynaptic neuron

1.1.4.4.2. Post synaptic neuron

1.1.4.4.3. Synaptic cleft

1.1.5. Functional categories of nerve cells

1.1.5.1. Sensory

1.1.5.2. Motor

1.1.5.3. Interneurons

1.1.5.3.1. Relay

1.1.5.3.2. Local interneurons

1.2. Glial cells / glia

1.2.1. Oligodendrites

1.2.2. Schwan cells

1.2.3. Astrocytes

2. Axosomatic synapse

3. Axodendritic synapse

4. Axoaxonic synapse

5. Neural circuits

5.1. Afferent inputs that take in information

5.2. Efferent outputs that convey the results

5.3. Principle of connectional specificity

5.4. Neurons are both excitory and inhibitory

5.5. Feedback and feedforward inhibition

5.6. Parralel processing

6. Nervous system as a whole

6.1. CNS

6.1.1. Brain

6.1.1.1. 6 subdivisiona

6.1.1.1.1. Medulla

6.1.1.1.2. Pons

6.1.1.1.3. Midbrain

6.1.1.1.4. Cerebellum

6.1.1.1.5. Diencephalon

6.1.1.1.6. Telencephalon

6.1.2. Spinal cord

6.1.3. Three protective membranes of CNS

6.1.3.1. Dura matter

6.1.3.1.1. Most outer and thickest

6.1.3.2. Arachnoid matter

6.1.3.2.1. The middle one

6.1.3.3. Pia matter

6.1.3.3.1. Inner most, most delicate, firmly adheres to brain surface

6.1.4. Brain and spinal cord floats in Cerebrospinal fluid

6.1.4.1. The csf occupies

6.1.4.1.1. Space between arachnoid and pia

6.1.4.1.2. The brain ventricles

6.1.4.1.3. Cistern and sulci

6.1.4.1.4. Central canal of spinal cord

6.2. PNS

6.2.1. Post somatic nervous system

6.2.1.1. Muscles

6.2.1.2. Joints

6.2.1.3. Limbs

6.2.1.4. Skin

6.2.1.5. Voluntary movement of skeletal muscles

6.2.2. Autonomic nervous system

6.2.2.1. Sympathetic Autonomic PNS

6.2.2.1.1. Stress response

6.2.2.2. Parasympathetic A PNS

6.2.2.2.1. Conserves body resources

6.2.2.3. These two deal with involuntary movement of smooth muscles and glands of organs

6.2.2.4. Viscera(internal organs)

6.2.2.5. Vascular system

6.2.2.6. Exocrine glands

7. Sympathetic and parasympathetic systems operate in opposing ways.