The nervous system

Get Started. It's Free
or sign up with your email address
The nervous system by Mind Map: The nervous system

1. Neural circuits

1.1. Afferent inputs that take in information

1.2. Efferent outputs that convey the results

1.3. Principle of connectional specificity

1.4. Neurons are both excitory and inhibitory

1.5. Feedback and feedforward inhibition

1.6. Parralel processing

2. Nervous system as a whole

2.1. CNS

2.1.1. Brain 6 subdivisiona Medulla Pons Midbrain Cerebellum Diencephalon Telencephalon

2.1.2. Spinal cord

2.1.3. Three protective membranes of CNS Dura matter Most outer and thickest Arachnoid matter The middle one Pia matter Inner most, most delicate, firmly adheres to brain surface

2.1.4. Brain and spinal cord floats in Cerebrospinal fluid The csf occupies Space between arachnoid and pia The brain ventricles Cistern and sulci Central canal of spinal cord

2.2. PNS

2.2.1. Post somatic nervous system Muscles Joints Limbs Skin Voluntary movement of skeletal muscles

2.2.2. Autonomic nervous system Sympathetic Autonomic PNS Stress response Parasympathetic A PNS Conserves body resources These two deal with involuntary movement of smooth muscles and glands of organs Viscera(internal organs) Vascular system Exocrine glands

3. Sympathetic and parasympathetic systems operate in opposing ways.

4. Individual cells

4.1. Nerve cells/neurons

4.1.1. Unipolar Simplest, single process

4.1.2. Bipolar Oval soma, gives rise to two processes, dendrites recieve and axon transmits Multipolar Single axon, many dendrites. Most comon type of neuron in mammals.

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

4.1.4. Four regions of neuron Cell body or soma Dendrites Axon Synapse Presynaptic neuron Post synaptic neuron Synaptic cleft

4.1.5. Functional categories of nerve cells Sensory Motor Interneurons Relay Local interneurons

4.2. Glial cells / glia

4.2.1. Oligodendrites

4.2.2. Schwan cells

4.2.3. Astrocytes

5. Axosomatic synapse

6. Axodendritic synapse

7. Axoaxonic synapse