General and special senses

1

• General and special senses
• External and internal reception
• Receptor transducer processor
• Shapes our world
• Can change with time

2

• The general senses
• Pain
• Temperature
• Touch, pressure, position
• Chemical

3

• Special senses
• Smell (Olfaction)
• Taste (Gustation)
• Vision
• Hearing
• Balance

4

• Aging and the senses
• Smell
• Taste
• Vision
• Hearing
• Balance

5

• General pain
• Nociceptors, free nerve endings
• Fast pain myelinated, more precise
• Slow pain unmyelinated, more general
• Referred pain phantom limb

6

• General temperature
• Thermoreceptors
• Free nerve endings
• Near skin surface

7

• General touch, pressure, position
• Tactile receptors p 280

8

• General Baroreceptors
• Free nerve endings
• Pressure changes in respiratory, GI, CV, renal
• Ie, carotid sinus, aortic sinus areas.

9

• General Proprioreceptors
• Monitor positions of our limbs
• Include
• free nerve endings,
• golgi tendon organs,
• muscle spindles

10

• General chemical
• Chemoreceptors
• Substance must be dissolvable
• Water
• Fat
• not all is known
• P 282

11

• Special senses (1/5) smell and olfaction
• Olfactory pathways
• P 283, reception
• Transduction and transmitance
• Processing

12

• Special, 2/5 taste (gustation)
• 5 receptor types p 284
• Taste pathways

13

• Special vision
• Anatomy p 286-291
• Physiology

14

• Special hearing

15

• Special - balance