Lectures 8 and 9
• Clarification from the Book!
• Know the anatomy from work sheet
• What’s the main point?
Lecture 9
• Sensory Transduction
• Receptive Fields
Mechanics
• Adaptation
• Feature Detection
• Maps
Pathways
Story Time I: Mechanics
Senses (8)
Transduction =
signaling (10)
Domains (9)
Basic Model: Stimulus results in a change in
membrane potential = action potential(11)
Basic Model: Parts and Mechanics (12)
Receptors
Thresholds =
point of action
potential (11)
Receptor Fields:
It’s about
STIMULUS (p 210)
Examples: Skin, Eye,
Ear (13-16)
Different depending
on Neuron Type (18)
“Sensory
Resolution”:
Endings
How does it fit with
the model?
How does it fit with
the model?
Adaption: Outline Subtitle, One Slide
• Onset vs Duration
General Scheme for Neuron “Adaptation”
Sensory
Neuron
Rapidly
Adapting
Rapidly/
Slowly Adapting
Slowly
Adapting
September 29, 2010
Lecture IX. Brain Pathways: Sensation
6
Story Time II: Pathways
Sensitivity and Neuron
Density
Dorsal Column - ML
Visual
Touch, Position,
Vibrations
Light, Movement,
etc
Specific
Connections
(Whiskers) (28-30)
Specific
Connections (3234)
THE BRAIN ATLAS, 3rd ed, pp. 192-193
Eye
Optic nerve
Hypothalamus
Optic chiasm
Optic Tract
Pretectum
Lateral geniculate
nucleus
Optic Radiation
Superior Colliculus
(Optic Tectum)
Visual Cortex
September 29, 2010
Lecture IX. Brain Pathways: Sensation
8
What’s the Point?
• Using the main point is explicit in the title
• Ask yourself what is the main point of this
slide? What do I need to understand to get
that point?
• How does this slide fit in with the lecture?