Chapter 31 Sensory Function of the Nervous System
Chapter 31 Sensory Function of the Nervous System
Contents Sensory receptors and sensory organs Pain The visual system The auditory Systems
Contents • Sensory receptors and sensory organs • Pain • The visual system • The Auditory Systems
Sectⅰon1 Sensory receptor and sensory organ
Section 1 Sensory Receptor and Sensory Organ
Part I Sensory receptors specialized nerve cells that transduce energy nto neural signals mode?specific Law of Specific Nerve Energies.(神经特殊能量 定律)” sensory messages are carried on separate channels to different areas of the brain detect a small range of energy levels Eye:400-700nM Ear:20-20000Hz Taste buds: specific chemicals
Part 1 Sensory Receptors • specialized nerve cells that transduce energy into neural signals • “mode” specific – “Law of Specific Nerve Energies（神经特殊能量 定律）”: sensory messages are carried on separate channels to different areas of the brain • detect a small range of energy levels – Eye: 400-700 nM – Ear: 20-20,000 Hz – Taste buds: specific chemicals
Spectrum of the electromagnetic Wave ncreasing energy M Increasing wavelength 0.001 11010000.011 100 n nm nmnm cmcm X- UV Gamma rays rays light Infrared Microwaves Radio waves Visible light 380430 500 560600650 750 nm nm nm n
Spectrum of the Electromagnetic Wave