Nervous systems consists of the central nervous system (brain and spinal cord) and the peripheral nervous system (cranial and spinal nerves) Brain is divided into 3 major areas 1. Cerebrum Pairs of lobes 2. Brain stem 3. Cerebellum Four lobes are: Frontal-largest lobe‚ concentration‚ abstract thought‚ information storage‚ memory and motor function‚ Broca’s area (motor control of speech)‚ affect‚ judgement‚ personality and inhibitions Parietal- sensory lobe‚ analyzes sensory information
Premium Neuron Nervous system Brain
-We have 2 parts in our nervous system: The central nervous system (CNS) is the nerves in our brain and spinal chord. The peripheral nervous system (PNS) is a network of nerve cells in the rest of our body. -Our nervous system detects stimuli and allows us to react to them. -Stimulus: a change‚ action or occurrence in the environment that can cause an organism to respond. Eg. Light‚ noise‚ pressure… How do we detect stimuli? -We have sensory organs that detect particular stimuli eg. Skin What
Premium Eye Nervous system Neuron
Nervous System Functions of the Nervous System 1. Detect changes and feel sensations 2. Initiate responses to changes 3. Organize and store information Divisions 1. Central Nervous System – brain and spinal cord 2. Peripheral Nervous System – cranial nerves and spinal nerves (relays info to/from the CNS) - Autonomic Nervous System Nerve Tissue – neurons (nerve fibers) and specialized cells (Schwann‚ neuroglia) 1. Neuron cell body contains the nucleus; cell bodies are in the CNS or trunk;
Premium Neuron Nervous system Action potential
Chapter 16 The Autonomic Nervous System Sympathetic (Thoraco-lumbar) division Parasympathetic (Cranial-sacral) division Somatic Motor vs Visceral Motor ■ ■ ■ ■ Somatic motor is directed from cortical levels to skeletal muscles and is voluntary. Visceral motor is directed from hypothalamus and midbrain and is involuntary‚ but has input from cortex and thalamus. Somatic lower motor neuron is in ventral horn of gray matter and neurotransmitter at skeletal muscle is Ach. Visceral motor comes from
Premium Nervous system Acetylcholine Sympathetic nervous system
14: The Autonomic Nervous System Objectives Introduction 1. Define autonomic nervous system and explain its relationship to the peripheral nervous system. 2. Compare the somatic and autonomic nervous systems relative to effectors‚ efferent pathways‚ and neurotransmitters released. 3. Compare and contrast the functions of the parasympathetic and sympathetic divisions. ANS Anatomy 4. For the parasympathetic and sympathetic divisions‚ describe the site of CNS origin‚ locations of ganglia
Premium Parasympathetic nervous system Nervous system Autonomic nervous system
Autonomic nervous system The autonomic nervous system (ANS or visceral nervous system) is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness‚ and controls visceral functions. The ANS affects heart rate‚ digestion‚ respiration rate‚ salivation‚ perspiration‚ diameter of the pupils‚ micturition (urination)‚ and sexual arousal. Whereas most of its actions are involuntary‚ some‚ such as breathing‚ work in tandem with the conscious
Premium Autonomic nervous system Nervous system Parasympathetic nervous system
The TheNervous NervousSystem System Prof. Melvin Carreon Physiological Psychology University of the East Anatomical Directions Rostral/Anterior – toward the head of a fourlegged animal Caudal/Posterior – toward the tail Inferior/Ventral – toward the belly Superior/Dorsal – toward the back Neuraxis – an imaginary line that runs the length of the spinal cord to the front of the brain Midline – an imaginary line dividing the body into two equal halves Ipsilateral – directional term
Free Brain Cerebrum Central nervous system
NERVOUS SYSTEM The nervous system consists of the brain‚ spinal cord‚ sensory organs‚ and all of the nerves that connect these organs with the rest of the body. Together‚ these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system (CNS)‚ where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system (PNS) monitor conditions
Premium Nervous system Spinal cord Peripheral nervous system
he nervous system is the communication network of the body. It consists of a complex collection of nerves and specialized cells‚ called neurons‚ that transmit messages across the different parts of the body in order for it to function and react correctly. They are known as the building blocks of the nervous system. Structurally they have long extensions that extend out from the cell body. There are two types of these extensions; dendrites‚ which are extensions of the neurons that receive signals
Premium Nervous system Neuron Brain
Nervous System The two types of the nervous system are the Central nervous system and the peripheral nervous system. They are responsible for integrating‚ processing‚ and coordinating Sensory data and motor commands the central nervous system‚ which interprets sensory input and carry information to maintain homeostasis. CNS can’t be regenerate because a CNS consists of the spinal cord that mean if it’s break the spinal cord is break also. The peripheral nervous system consists of the nerves
Premium Neuron Nervous system Axon