Somatic Sensory System

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Presentation transcript:

Somatic Sensory System

Receptor Potentials

Thermal and Mechanical Channels

The Skin Harbors Morphologically Distinct Mechanoreceptors

The Major Classes of Somatic Sensory Receptors

Afferent Axon Types

Slowly Adapting and Rapidly Adapting Mechanoreceptors Respond Differently to Stimulation Tonic Phasic

Activity Patterns in Fingertip

General Organization of the Somatic Sensory System

General Organization of the Somatic Sensory System

Dermatomes

Sensitivity of Tactile Discrimination Varies with Location on the Body Surface

Main Mechanosensory Pathways from the Body

Main Mechanosensory Pathways from Face

The Somatic Sensory Portions of the Thalamus and Cortical Targets

Somatotopic Order in the Human Primary Somatic Sensory Cortex