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Functional Organization The structures of the nervous system have three basic functions: 1) sensory detection and conduction, 2) information processing and integration, and/or 3) motor commands and conduction. Both sensory and motor functions in the PNS can be further subdivided by what areas of the body they connect to: • Somatic refers to the body or the wall of the body, not to the organs inside the body. Essentially, this is the integumentary, skeletal, and muscular systems as well as senses whose stimuli originate outside of the body (light, sound waves, odorants, and touch). Somatic motor functions are voluntary. Visceral refers to the organs inside the body. Essentially, these are the organs within the thoracic, abdominal, and pelvic regions as well as the blood vessels throughout the body. Visceral motor functions are involuntary; these are also called the autonomic nervous system (ANS). Information Flow Motor information originates from the CNS and travels through nerves to effector organs. Information flowing in this direction is called “efferent”. HINT - think Efferent Exits the CNS. Sensory information originates at peripheral receptors and travels through nerves into the CNS. Information flowing in this direction is called “afferent”. HINT - think Afferent Arrives at the CNS. Complete the following chart: Division CNS PNS Organs Subdivisions Function(s) (Motor, sensory, integration) Information direction(s) (afferent, efferent, both, n/a)

Functional Organization The structures of the nervous system have three basic functions: 1) sensory detection and conduction, 2) information processing and integration, and/or 3) motor commands and conduction. Both sensory and motor functions in the PNS can be further subdivided by what areas of the body they connect to: • Somatic refers to the body or the wall of the body, not to the organs inside the body. Essentially, this is the integumentary, skeletal, and muscular systems as well as senses whose stimuli originate outside of the body (light, sound waves, odorants, and touch). Somatic motor functions are voluntary. Visceral refers to the organs inside the body. Essentially, these are the organs within the thoracic, abdominal, and pelvic regions as well as the blood vessels throughout the body. Visceral motor functions are involuntary; these are also called the autonomic nervous system (ANS). Information Flow Motor information originates from the CNS and travels through nerves to effector organs. Information flowing in this direction is called “efferent”. HINT - think Efferent Exits the CNS. Sensory information originates at peripheral receptors and travels through nerves into the CNS. Information flowing in this direction is called “afferent”. HINT - think Afferent Arrives at the CNS. Complete the following chart: Division CNS PNS Organs Subdivisions Function(s) (Motor, sensory, integration) Information direction(s) (afferent, efferent, both, n/a)

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Functional Organization The structures of the nervous system have three basic functions: 1) sensory detection and conduction, 2) information processing and integration, and/or 3) motor commands and conduction. Both sensory and motor functions in the PNS can be further subdivided by what areas of the body they connect to: • Somatic refers to the body or the wall of the body, not to the organs inside the body. Essentially, this is the integumentary, skeletal, and muscular systems as well as senses whose stimuli originate outside of the body (light, sound waves, odorants, and touch). Somatic motor functions are voluntary. Visceral refers to the organs inside the body. Essentially, these are the organs within the thoracic, abdominal, and pelvic regions as well as the blood vessels throughout the body. Visceral motor functions are involuntary; these are also called the autonomic nervous system (ANS). Information Flow Motor information originates from the CNS and travels through nerves to effector organs. Information flowing in this direction is called “efferent”. HINT - think Efferent Exits the CNS. Sensory information originates at peripheral receptors and travels through nerves into the CNS. Information flowing in this direction is called “afferent”. HINT - think Afferent Arrives at the CNS. Complete the following chart: Division CNS PNS Organs Subdivisions Function(s) (Motor, sensory, integration) Information direction(s) (afferent, efferent, both, n/a)
Transcribed Image Text:Functional Organization The structures of the nervous system have three basic functions: 1) sensory detection and conduction, 2) information processing and integration, and/or 3) motor commands and conduction. Both sensory and motor functions in the PNS can be further subdivided by what areas of the body they connect to: • Somatic refers to the body or the wall of the body, not to the organs inside the body. Essentially, this is the integumentary, skeletal, and muscular systems as well as senses whose stimuli originate outside of the body (light, sound waves, odorants, and touch). Somatic motor functions are voluntary. Visceral refers to the organs inside the body. Essentially, these are the organs within the thoracic, abdominal, and pelvic regions as well as the blood vessels throughout the body. Visceral motor functions are involuntary; these are also called the autonomic nervous system (ANS). Information Flow Motor information originates from the CNS and travels through nerves to effector organs. Information flowing in this direction is called “efferent”. HINT - think Efferent Exits the CNS. Sensory information originates at peripheral receptors and travels through nerves into the CNS. Information flowing in this direction is called “afferent”. HINT - think Afferent Arrives at the CNS. Complete the following chart: Division CNS PNS Organs Subdivisions Function(s) (Motor, sensory, integration) Information direction(s) (afferent, efferent, both, n/a)
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