* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Neurology - Porterville College
Aging brain wikipedia , lookup
Axon guidance wikipedia , lookup
Neuropsychology wikipedia , lookup
Neuroplasticity wikipedia , lookup
Premovement neuronal activity wikipedia , lookup
Feature detection (nervous system) wikipedia , lookup
Embodied cognitive science wikipedia , lookup
Time perception wikipedia , lookup
Endocannabinoid system wikipedia , lookup
Node of Ranvier wikipedia , lookup
Electrophysiology wikipedia , lookup
Metastability in the brain wikipedia , lookup
Psychoneuroimmunology wikipedia , lookup
Development of the nervous system wikipedia , lookup
Neuroscience in space wikipedia , lookup
Neural engineering wikipedia , lookup
Circumventricular organs wikipedia , lookup
Single-unit recording wikipedia , lookup
Holonomic brain theory wikipedia , lookup
Activity-dependent plasticity wikipedia , lookup
Microneurography wikipedia , lookup
Nonsynaptic plasticity wikipedia , lookup
Neuromuscular junction wikipedia , lookup
Biological neuron model wikipedia , lookup
Nervous system network models wikipedia , lookup
Synaptogenesis wikipedia , lookup
End-plate potential wikipedia , lookup
Clinical neurochemistry wikipedia , lookup
Synaptic gating wikipedia , lookup
Molecular neuroscience wikipedia , lookup
Neuroregeneration wikipedia , lookup
Chemical synapse wikipedia , lookup
Neuropsychopharmacology wikipedia , lookup
Stimulus (physiology) wikipedia , lookup
Neurology Lecture 1 Part 1 The Final Frontier • Space the final frontier? • The brain, the final frontier! The nervous system consists of: • • • • The Brain Spinal Cord Peripheral Nerves Divided system – Central Nervous System (CNS) • Brain & Spinal Cord – Peripheral Nervous System (PNS) • Nerves (peripheral & Cranial) Nervous System • Controls and coordinates all parts of the body • By transmission of electrical impulses (Electrical-chemical system) Purpose of the Nervous System • Control Center • Communication Receive evaluate respond • Stimulation of Movement • Maintains Homeostasis – Along with the what system? • Endocrine Function of Nervous System • Coordination & Control 1. Receive info (stimuli) 2. Computes info determines responses 3. Transmit info action Neuron • Basic functional unit – Afferent neuron • Sensory • Carry info from PNS CNS – Efferent neuron • Motor • Carry into from CNS PNS Neuron structure • Cell body/ Soma – Nucleus • Dendrites – Carry impulses toward the cell body • Axons – Carry impulses away from the cell body Damaged Neuron • CNS = – Irreversible • PNS = – will repair itself if the cell body is not destroyed Synaptic Junction • Neuron connect to each other end to end • Where two neurons come together – Synaptic junction – Synapse – Inter-neuron space Synaptic Junction • Terminal end of Axon = Synaptic Vesicles • Nerve impulse reaches the vesicle release substance neurotransmitters into the synaptic junction • Nerve impulses must have a receptor site Neurotransmitters • Synthesized in the soma • Special Properties – Excitability – Inhibitory – Modify • 30+ neurotransmitters Excitatory Neurotransmitters • Serotonin – – – – – Sleep Sensory perception Temperature Mood Inhibits pain Excitatory Neurotransmitters • Dopamine – Gross subconscious movement – Fine motor skills – Emotional responses Excitatory Neurotransmitters • Norepinepherine – Maintains arousal – Overall activity – Mood • Acetylcholine – Vital for short term memory – Speeds impulse transmission Inhibitory Neurotransmitters • Cholinergics – Stabilizers – Inhibitors • GABA • Dopamine – Basal Ganglia – Acetylcholine & Dopamine are opposites which work together to create homeostasis Neuropeptides • Not neurotransmitters • Encephalin • Chemical endorphins – – – – Suppress pain Memory Learning Sexual activity Nerve Impulse • The nervous system is powered by electrical and chemical energy – – – – K+ Na+ Cl(Ca+) Nerve Impulse • Absolute retraction period – The time interval phase that occurs when the neuron cannot be restimulated