Download Free Medical Neurophysiology-Neurons PowerPoint Presentation

Neurophysiology-Neurons PowerPoint Presentation

DOWNLOAD MEDICAL POWERPOINT PRESENTATION

About This Presentation

Description : Check out this medical presentation on Neurology, which is titled "Neurophysiology - Neurons", to know about the basic function of the nervous system and understand the parts of a neuron.

Tags : Neurology, Neurophysiology, Neurons, function, nervous system

Published on : Aug 23, 2021 | Views : 3121 | Downloads : 2

Shareable Url :

Embed Code :

Comment

Transcript

Slide 1-

BIO 132 Neurophysiology Lecture 2 Neurons
Slide 2-

Lecture Goals: Understanding the basic function of the nervous system. Understanding the parts of a neuron.
Slide 3-

Neuron – A specialized cell of the body that can communicate information quickly by using ionic currents and chemical signals called neurotransmitters. Nerve - Many neurons that are bundled together and covered by a connective tissue sheath. Nervous System – The entire network of interconnecting neurons.
Slide 4-

Overall function of the nervous system: To control motor output of the body based on sensory information it detects from both the internal and external environments of the body.
Slide 5-

There are ~100 billion neurons in the brain. (Current population is less than 7 billion people.) Each neuron can make one to thousands of connections with other neurons. Glial cells are support cells of the nervous system There are ~10 times as many glial cells as there are neurons. Used to nourish, insulate, direct growth of neurons.
Slide 6-

Parts of a typical neuron: Neuron Morphology Cell body Axon Dendrites Axon terminal
Slide 7-

Contains most of the cellular machinery of the neuron (nucleus, ER, mitochondria, golgi complex, etc). Is where most the synthesis of new cellular products occurs. Cell Body (soma) Cell body
Slide 8-

Means “tree” in Latin. Main site where input is received from other neurons. Dendrites Dendrites
Slide 9-

Long projection from cell body that carries an ionic signal, called an action potential, to other neurons. Can be very short or very long (up to 6 feet in humans). Can send off many branches (collaterals). Axon Axon
Slide 10-

Is at the end of each axon. Contains vesicles filled with neurotransmitter. Forms a connection with another neuron, called a synapse. Axon Terminal Axon terminal
Slide 11-

There are several conventions for classifying neurons: By neurites (projections from the cell body). By dendrite shape. By connections. By neurotransmitter released Classifying Neurons
Slide 12-

Unipolar neuron - A single neurite (projection from cell body: Bipolar – Two neurites (both part of the axon) Multipolar – Many neurites (usually one axon and many denrites) Classification By Neurites
Slide 13-

Primary sensory – dendrites detect external stimuli. Motor - makes a direct connection with skeletal muscle. Interneuron - only makes connections with other neurons. (Most numerous type) Classification By Connections Stimuli
Slide 14-

Based on the type of neurotransmitter released. Examples: Cholinergic Noradrenergic GABAergic Glutamatergic Dopaminergic Classification By Neurotransmitter Acetylcholine (ACh) Norepinephrine (NE) GABA Glutamate (Glu) Dopamine (DA)
Slide 15-

Astrocytes Most numerous Fill the space between neurons Envelope synapses to limit the spread of neurotransmitters Regulate chemical content of extracellular fluid Remove neurotransmitters from synapse Myelinating glia – insulate axons from ion leakage Oligodentrites Found in Central NS and spinal cord Can wrap around several axons Schwann cells Found in peripheral NS Wrap around a single axon Classifying Glia