Lab 6

Agenda

  1. Turn in Lab 5 by the staplers on the North bench.
    1. Needs a name and group number
  2. ~10 min.: Q&A on Lab 5 material
  3. 20 min.: Quiz 5
  4. ~2 hrs.: Lab 6: Sensory Physiology
  5. ~30 min.: Next lab reminders/questions/review

Lab 5 Q&A

Neuron Anatomy

Ion Channels and Pumps

Action Potentials

  • What is an action potential (AP)?
  • Can you label/define the parts?
  • Define threshold.
  • Describe the action of these ions during an AP.
    • Na+
    • K+
    • Ca++
    • Cl-
  • How are APs similar to nerve potentials? How are they different?

Summation

  • What kinds are there?
    • Temporal
    • Spatial
  • Can you define them?

Drug Effects

  • Monosodium Glutamate (MSG)
  • Nicotine
  • Calcium chloride

Quiz 5

Sensory Physiology

Lab 6

Lab Purpose

To allow students to experiment with principles of cutaneous sensory function, proprioception, pain and adaptation.

Lab objectives

  • Explain difference in two-point thresholds in terms of sensory receptor density and filed.
  • Explain adaptation in terms of action potentials and know which cutaneous modalities adapt and which do not.
  • Be able to discuss the function of muscle spindle fibers, Golgi tendon organs, and joint receptors.
  • Explain the stretch reflex.
  • Explain referred pain.
  • Explain the causes of myopia, hyperopia, color blindness, and ways if any to correct these maladies.
  • Explain stimulus coding and how it is used in the nervous system.

Lab Safety

  • Two point touch discrimination - be gentle!

Core Principles

Cutaneous Perception

Lateral inhibition

Myotatic Reflex

Referred pain

Vision

  • Types:
    • Myopia
    • Hyperopia
    • Color blindness
  • How do we fix them?

Stimulus coding

Lab 7: Skeletal Muscle Physiology

  • Read:
    • Stanfield pgs. 323-350
    • Silverthorn pgs. 379-402
  • Bring:
    • Calculator
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