1. Nervous System
1.1. Neurons
1.1.1. Structure
1.1.1.1. Dendrite
1.1.1.1.1. receive signals from other neurons and bring this information to the cell body
1.1.1.2. Nucleus
1.1.1.2.1. directs activities of the cell
1.1.1.3. Soma (cell body)
1.1.1.3.1. cell's life support center
1.1.1.4. Axon
1.1.1.4.1. carries signals away from the cell body to other neurons
1.1.1.5. Synapse
1.1.1.5.1. connection b/w two neurons
1.1.1.6. Synaptic cleft
1.1.1.6.1. gap between two neurons into which neurotransmitters are released
1.1.2. Neurotramsmitters
1.1.2.1. Adrenaline (fight/flight)
1.1.2.2. Noradrenaline (concentration)
1.1.2.3. Dopamine (pleasure)
1.1.2.4. Serotonin (mood)
1.1.2.5. GABA (calming)
1.1.2.6. Acetylcholine (learning)
1.1.2.7. Glutamate (memory)
1.1.2.8. Endorphins (euphoria)
1.1.3. Types
1.1.3.1. Sensory (afferent) neurons
1.1.3.1.1. stimuli detection, messengers that bring signals **toward** the CNS
1.1.3.2. Motor/efferent neurons
1.1.3.2.1. Take signals **away** from the CNS and to muscles and glands, telling them to take action, like moving a muscle.
1.1.3.3. Interneurons/ association
1.1.3.3.1. These are the brain's decision-makers. They process the information from sensory neurons, figure out what it means, and decide what to do. They are found **only** in the CNS.
1.2. Peripheral Nervous System
1.2.1. Sensory (afferent) division
1.2.2. Motor (efferent) division
1.2.2.1. Somatic Nervous System
1.2.2.2. Automatic Nervous System
1.2.2.2.1. Sympathetic Division (mobilise)
1.2.2.2.2. Parasympathetic Division (conserve)
1.3. Central Nervous System
1.3.1. Brain
1.3.1.1. Cerebral Hemispheres
1.3.1.1.1. Corpus collosum
1.3.1.2. Forebrain
1.3.1.2.1. Cerebrum
1.3.1.2.2. Cerebral Cortex/Cerebrum
1.3.1.2.3. Basal Ganglia
1.3.1.2.4. Limbic system
1.3.1.3. Midbrain
1.3.1.3.1. Reticular Activating System (RAS)
1.3.1.3.2. grey matter
1.3.1.4. Hindbrain
1.3.1.4.1. Cerebellum
1.3.1.4.2. Pons
1.3.1.4.3. Medulla Oblongata
1.3.1.5. Disorders
1.3.1.5.1. Vascular
1.3.1.5.2. Tumour/neoplasm
1.3.1.6. Traumatic Brain Injury (TBI)
1.3.1.6.1. Hematoma
1.3.1.6.2. Hemorrhage
1.3.1.6.3. closed-head
1.3.1.6.4. open-head
1.3.2. Spinal Cord