Course book Goldstein, Sensation and Perception exams two mid-terms 1½ hours multiple choice + short notes end-of-term 2-3 hours 30%, 30% and 40% (best counted as 40%) if not registered, go to office TA = Lisa Pritchett Room: 1022 Sherman Health Research Centre Office Hrs: by appointment Phone: ext Instructor = Prof Laurence Harris Room: 1018 Sherman Health Research Centre phone: ext feel free to interrupt with questions use of web page and

Timetable for 3270 (2011) 1Jan 6<-- intro 2Jan 13 3Jan 20 4Jan 27 5Feb 3<-- midterm 1 6Feb 10 7Feb 17 Feb 24 reading week 8March 3 9March 10<-- midterm 2 10March 17 11March 24 12March 31 TBA<-- Final exam

PSYCH 3270 Sensation & Perception (II) Introduction

1 Principles of neural organization 2 Psychophysics 3 Somatosensory System (including the vestibular system) 4 Taste and Smell 5 Perception of Time 6 Speech Perception

Psychophysics threshold supra-threshold Neurosciences record lesion stimulation anatomy Singe unit Whole brain APPROACHES

Principles of Neural Organization section 1

Wilder Penfield

Section 2 PSYCHOPHYSICS

Section 3 SOMATOSENSORY (including vestibular system)

PRESSURE THRESHOLDS

Sensory homunculus

Falling Rabbit

Section 4 CHEMICAL SENSES

OLFACTORY BULB

Section 5 TIME PERCEPTION

-- All of these represent the same speed (m/s) -- bigger distance -- faster time! compression of space = compression of time!

Section 6 SPEECH PERCEPTION

Principles of Neural Organization section 1

Johannes Műller 1826 DOCTRINE OF SPECIFIC NERVE ENERGIES “regardless of how a receptor is stimulated it produces only one kind of sensory experience”

Figure 2.4 The neuron on the right consists of a cell body, dendrites, and an axon, or nerve fiber. The neuron on the left that receives stimuli from the environment has a receptor in place of the cell body.

1 -- electrical stimulation (artificial depolarization) 2 -- spatial and temporal integration of EPSPs and IPSPs across the neurone’s membrane resulting in the neuronal threshold being reached. Generator potential 3 -- sensory stimulation (transduction) mechanical (cytoskeleton) chemical (receptors, second messengers) light (hyperpolarization) WHEN DO CELLS PRODUCE ACTION POTENTIALS?

KEY WORDS

MODALITY labelled lines specific nerve energies INTENSITY proportional to frequency population (recruitment) DURATION rapidly adapting (RA) slowly adapting (SA) LOCATION locate a site distinguish two sites mapping Principles of Neural Coding