02 sensory signal processing

Sensory Signal Processing

Information

Sensation Perception

Attributes of a Stimulus

1. Modality

2. Location

3. Timing

4. Intensity

Transduction of sensory stimuli and Labeled Line Code

Stimulus Location

Weber’s Law of “Just Noticeable Difference”

Sensory thresholds

Stimulus intensity is encoded by frequency of AP

Sensory Processing

Somatic Sensory Signal Processing

Somatic Sensory Receptors

Excitation of sensory nerve

Transduction of sensory stimuli and Labeled Line Code

Types of nerve fiber - Principle of Connectional Specificity

Dermatomes

Trigeminal nerve

Central Pathway

Thalamus

Sensory Cortex

Thalamocortical projection

Integration of tactile information by Cortex

Each region of the somatic sensory cortex receives inputs from primarily one type of receptor.

Two Point Discrimination

Two Point Discrimination

Shape and Size Sensation

Spatial and Temporal Summation

Vibration Sense

Pain Signal Processing

Types of Pain

Pain Perception

Pain Pathway

Nociceptive Components of the Thalamus and Cortex

Gate control theory

Pain Modulation

The Placebo Effect

Sensitization

Visceral Pain

Phantom Limbs and Phantom Pain