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Ch. 15 Sensory Pathways and the Somatic Nervous System
Martini - Fundamentals of Anatomy & Physiology 11th Edition
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMartini, Nath, Bartholomew 11th EditionCh. 15 Sensory Pathways and the Somatic Nervous SystemProblema 3
Capitolo 15, Problema 3

The CNS interprets information entirely on the basis of the
(a) Number of action potentials that it receives
(b) Kind of action potentials that it receives
(c) Line over which sensory information arrives
(d) Intensity of the sensory stimulus
(e) Number of sensory receptors that are stimulated

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1
Understand that the Central Nervous System (CNS) interprets sensory information based on how the information is transmitted rather than the strength or number of signals alone.
Recall the concept of the 'labeled line' principle, which states that the CNS identifies the type of stimulus based on the specific pathway or nerve fiber (line) that carries the sensory information.
Recognize that the CNS does not distinguish stimuli by the kind of action potentials themselves, since all action potentials are essentially the same in form and strength.
Note that the intensity of a stimulus is encoded by the frequency of action potentials, but the CNS primarily uses the pathway to determine the nature of the stimulus.
Conclude that the CNS interprets information mainly based on the specific line over which sensory information arrives, making option (c) the key concept.

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Labeled Line Principle

The CNS interprets sensory information based on the specific neural pathway or 'line' over which the signals arrive. Each sensory modality has dedicated pathways, so the brain identifies the type of stimulus by the origin of the incoming action potentials, regardless of their number or intensity.
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Percorso guidato
1:56
First-Line Defenses

Action Potentials and Neural Coding

Action potentials are uniform electrical signals; their frequency and pattern encode stimulus intensity and duration, but the CNS does not distinguish 'kinds' of action potentials. Instead, it relies on where the signals come from to interpret sensory information.
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Action Potential

Sensory Receptor Specificity

Different sensory receptors respond to specific types of stimuli and send signals through dedicated pathways. The number of receptors activated can influence stimulus perception, but the CNS primarily uses the pathway identity to determine the nature of the stimulus.
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Sensory Receptors
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