The document discusses the human sensory system. It describes the different types of sensory receptors, including exteroceptors, proprioceptors, and interoceptors. It explains how stimuli are detected by receptors and transmitted as nerve impulses to the central nervous system. Key aspects covered include the transduction of stimuli into electrical signals, classification of nerve fibers, sensory pathways, and the perception and modulation of sensations.

22. Receptive fields in skin large if receptors are few, small if receptors are dense measured by two-point touch threshold Lateral inhibition - sensory neurons most strongly affected by a stimulus inhibit others in nearby receptive fields

23. Receptive field sizes vary by type: Meissner’s corpuscles - small Pacinian corpuscles - large

24. Two-Point Discrimination

29. Thank you

30. Referred Pain: Heart