Lecture_7 - Analgesia – suppression of painful stimuli,...

Info iconThis preview shows pages 1–21. Sign up to view the full content.

View Full Document Right Arrow Icon
Mammalian Physiology BIOL 472 Lecture 7 – Sensory Physiology 1. Touch 2. Vision 3. Hearing 4. Chemical Senses
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Somatic Sensation Mechanoreceptors in the skin – touch, pressure; slow and fast adapting; large (finger) and small (fingertip) receptive fields
Background image of page 2
1. Somatic Sensation Thermoreceptors in the skin – respond to the temperature of the receptor or tissue around it not air temperature Warm-sensitive receptors Cold-sensitive receptors
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Somatic Sensation Pain is sensed by nociceptors, tissue damage, too much stimuli Free nerve endings no receptors Nociceptors – three types 1. Thermal - intense temperature or heat – A δ fibers 2. Mechanical – intense mechanical stimuli – A δ fibers 3. Polymodal – mechanical, heat and noxious chemicals – C- fibers
Background image of page 4
1. Somatic Sensation Pain – sensory pathway
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Somatic Sensation Referred Pain – afferents activate interneurons
Background image of page 6
1. Somatic Sensation Hyperalgesia
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Somatic Sensation
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 16
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 18
Background image of page 19

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 20
Background image of page 21
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Analgesia – suppression of painful stimuli, other areas of the brain involved 1. Somatic Sensation Sensory Pathways – roads to the brain 1. Somatic Sensation Sensory Mapping – Motels in the brain (sensory cortex) 2. Vision Vision receptors are sensitive to photons of light – wavelength (400 and 700 nM) and frequency Eye anatomy: 2. Vision Eye anatomy: 2. Vision Optics: Bending of light rays by the lens allows us to focus – refraction Converge on back of eye – bend inward 2. Vision Optics : Accommodation for distance 2. Vision Optics : Genetics of lens shape 2. Vision Photoreceptors and transduction 2. Vision Activation of photoreceptors 2. Vision 2. Vision Visual Processing – brain connections 2. Vision Color Vision – specialization of the cones, different cones for different wavelengths of light 2. Vision Eye Movements – fast = saccades...
View Full Document

This note was uploaded on 03/20/2008 for the course BIOL 472 taught by Professor Jones during the Spring '08 term at CSU East Bay.

Page1 / 21

Lecture_7 - Analgesia – suppression of painful stimuli,...

This preview shows document pages 1 - 21. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online