Presentation is loading. Please wait.

Presentation is loading. Please wait.

NERVOUS SYSTEM NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through nerves.

Similar presentations


Presentation on theme: "NERVOUS SYSTEM NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through nerves."— Presentation transcript:

1 NERVOUS SYSTEM NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through nerves.

2 Central Nervous System Brain and Spinal Cord Receives messages from the PNS (everything outside of brain and spinal cord) and sends a response or reaction Tells the body how to respond to a stimulus

3 Spinal Cord About 18 +/- inches Sends messages from brain to body and visa versa

4 Brain Controls activities of the nervous system Controls activities of the nervous system Allows you to think, reason, coordinate, learn, remember, perform all bodily functions whether voluntary or involuntary Allows you to think, reason, coordinate, learn, remember, perform all bodily functions whether voluntary or involuntary

5 Brain Parts Cerebrum Cerebellum Brain stem

6 Cerebrum LARGEST, most complex part of brain Controls conscious thought, learning, & memory Right side controls the left side of the body Left side controls the right side of the body

7 Cerebrum Lobes Frontal Lobe Parietal Lobe Occipital Lobe Temporal Lobe

8 Frontal Lobe Voluntary movement Voluntary movement Use of language Use of language Intellect Intellect Personality Personality

9 Parietal Lobe Sensory Information Sensory Information Heat Heat Cold Cold Pain Pain Touch Touch Kinesthetics—where your body is and what it is doing Kinesthetics—where your body is and what it is doing

10 Occipital Lobe Vision Vision

11 Temporal Lobe Hearing Hearing Smell Smell Some memory Some memory Some thought Some thought Some judgement Some judgement

12 Cerebellum Coordinates movement of the skeletal muscles Coordinates movement of the skeletal muscles Posture Posture Balance Balance

13 Brain Stem 3-inch stalk of nerve cells and fibers that connect the brain to the spinal cord 3-inch stalk of nerve cells and fibers that connect the brain to the spinal cord The “Gateway” from the brain to the body and the body to the brain The “Gateway” from the brain to the body and the body to the brain

14 Brain Stem Parts Medulla oblongata Medulla oblongata Pons Pons Midbrain Midbrain Thalamus Thalamus Hypothalamus Hypothalamus

15 Medulla Oblongata The lowest portion of the brain stem The lowest portion of the brain stem Regulates heart rate Regulates heart rate Regulates breathing rate Regulates breathing rate Regulates hearing, talking, and swallowing Regulates hearing, talking, and swallowing Regulates reflexes such as: Regulates reflexes such as: Coughing Coughing Sneezing Sneezing Vomiting Vomiting

16 Pons Sits just above the M.O. Sits just above the M.O. Connects nerve impulses to other parts of the brain Connects nerve impulses to other parts of the brain Helps breathing Helps breathing Controls muscles of the eyes and face Controls muscles of the eyes and face

17 Midbrain Highest portion of the brain stem Highest portion of the brain stem Involved in controlling eyeball movement and pupil size Involved in controlling eyeball movement and pupil size

18 Thalamus Relay center for incoming messages Relay center for incoming messages

19 Hypothalamus Controls various body processes Controls various body processes Temperature Temperature Appetite Appetite Sleep Sleep Through the pituitary gland it controls metabolism, sexual development, and emotion Through the pituitary gland it controls metabolism, sexual development, and emotion

20 Peripheral Nervous System (PNS) Nerves outside of the brain and spinal cord Nerves outside of the brain and spinal cord Sends info from inside and outside of your body to the CNS for the brain to respond to Sends info from inside and outside of your body to the CNS for the brain to respond to

21 PNS Parts Autonomic Nervous System Somatic Nervous System

22 Autonomic Nervous System Controls Involuntary functions Sympathetic—Reflex—”Fight or Flight” Parasympathetic—opposes actions of the sympathetic nervous system by slowing bodily functions during rest

23 Somatic Nervous System Relays messages from the eyes, ears, nose, tongue, and skin to the CNS which sends a response to the skeletal muscles to move or react to a situation

24 Neurons Nerve cells Nerve cells Cell body—contains the control center of the nerve cell—nucleus Cell body—contains the control center of the nerve cell—nucleus Dendrites—branched structures that extend from the cell body. They receive info from other neurons or sensory receptors and transmit impulses toward the cell body Dendrites—branched structures that extend from the cell body. They receive info from other neurons or sensory receptors and transmit impulses toward the cell body Axons—transmit messages away from the cell body and toward other neurons, cells, or glands Axons—transmit messages away from the cell body and toward other neurons, cells, or glands

25 THE BRAIN


Download ppt "NERVOUS SYSTEM NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through nerves."

Similar presentations


Ads by Google