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The Nervous System PowerPoint Presentation

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Description : Check out this medical PowerPoint presentation titled "The Nervous System”.

This medical PowerPoint presentation is about the nervous system, a complex network of specialized cells called neurons, which transmit information throughout the body. It is responsible for controlling and coordinating all body functions, including movement, sensation, perception, thought, and emotion.

The nervous system is divided into two main parts-the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and the spinal cord, while the PNS consists of all the nerves that connect the CNS to the rest of the body.

The nervous system is further divided into different sub-systems, including the somatic nervous system, which controls voluntary movement and sensation, and the autonomic nervous system, which regulates involuntary functions such as heart rate, digestion, and breathing.

The nervous system uses electrical and chemical signals to transmit information between neurons, allowing the body to respond to internal and external stimuli. The brain is the control center of the nervous system and is responsible for receiving and processing sensory input, generating thoughts and emotions, and initiating motor output.

Tags : The Nervous System, neurons, the central nervous system, the peripheral nervous system, Neurology, Neurology PowerPoint presentation

Published on : Jun 07, 2023 | Views : 2282 | Downloads : 1

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Slide 1-

Human Physiology: The Nervous System PPT #2 chapter 29 in text
Slide 2-

Objectives and Questions: 1. I can describe the functions of the nervous system 2. I can describe the parts of a neuron cell and identify how they transmit electrochemical impulses. 3. I can compare and contrast the central and peripheral nervous systems 4. I can identify and explain different areas of the brain and their functions. 5. I can explain how the nervous system passes information between the external environment and the many parts of the body.
Slide 3-

The Nervous system is: A physically connected network of cells, tissues and organs that allow us to communicate with and react to the environment and perform life activities.
Slide 4-

Cool Nervous System Facts: As a fetus in the womb, neurons develop at the rate of 250,000 per minute. We have about 100 billion nerve cells in our brain by adulthood (over 600 miles worth) – yet we typically use around 4% at any given time Neurons are our largest cells Messages transmit at speeds up of to 180 MPH
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FOUR PRIMARY FUNCTIONS OF NERVOUS SYSTEM Sensing the world Vision, Hearing, Smell, Taste, Touch Transmitting information Processing information Producing a response
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The functional unit of the nervous system is the nerve cell, the NEURON They send electrochemical messages around the body Glial cells provide support and protection for neurons Neurons
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Parts of a neuronNerve Cell
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Parts of nerve cell Dendrites : recieve chemical signals from neighboring cells. Cell Body: contains the nucleus & organelles Axon: long extension that carries electrical messages away from the body to the terminal axons Terminal Axons: passes the signal to the next cell. Myelin sheath: Protective covering for axon
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3 main types of neurons: Sensory neuron = detect stimuli Interneurons = relay sensory signals to brain then return message back to motor neurons. Motor neuron = pass message from brain to rest of body for muscle response This coordinated pathway is known as the REFLEX ARC Types of Neurons
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Reflex Arc“ what happens when you step on a nail”? Reflexes are automatic The Stimulus (nail ) is received by the sensory neurons in the foot This info travels to the spine, where the interneuron is triggered The interneuron transmits signal to brain (through the spinal cord)and carries message back and stimulates the motor neuron, to move the foot
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A progressive wave of electric and chemical activity along a nerve fiber that stimulates or inhibits the action of a muscle, gland, or other nerve cell *This is how the information moves from sensory neurons to interneuron to motor neurons Nerve Impulse
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Central Nervous System (CNS) Receives, interprets and sends signals to PNS Has 2 main parts: Brain – main control center Spinal Cord – connects and relays nerve impulses to the brain 2 main divisions:
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Connects CNS to all organ systems Made up of: Sensory Neurons: detect stimuli Motor Neurons: carry signal to stimulate response 2 major subsystems: Somatic – voluntary movement (balance, movement) Autonomic – involuntary movement (digestion, fight or flight) Peripheral Nervous System (PNS)
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Central Nervous System Brain Cerebrum Cerebellum Brain Stem and Pons Lobes (4) Spinal Cord “information superhighway” Peripheral Autonomic Sympathetic Fight or Flight Parasympathetic Relaxation Somatic Sensory and Motor Nerves Reflex Arc Parts of the Nervous System
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Slide 20-

The Brain
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Cerebellum Smaller part of the brain ,towards the back FUNCTIONS: Coordinates all movement Helps maintain posture, muscle control, and balance
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Cerebrum Large front part of the brain FUNCTIONS: Voluntary activity Memory Language Receives and responds to sensory signals Controls motor functions
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Top layer of the brainStores: experiences and/or learning Frontal- behavior & emotion Temporal- memory & emotion, speech and hearing Occipital- vision Parietal- Sensory info concerning touch THE CORTEX
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Brain Stem and Pons BRAIN STEM swallowing, coughing, sneezing, and vomiting Includes the Medulla Oblongata PONS Breathing Heart rate Internal Organs Damage in this area will usually kill you.
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“controls: emotions and memories” LIMBIC SYSTEM Damage to these areas can lead to amnesia or emotional disturbances