Psych3 – The Biological Basis of Psychology--Somatosensory Systems Objectives • Distinguish between the 3 different types of somatosenosry information. • Distinguish between the 3 different types of exteroceptive systems and describe their pathways from the periphery to the somatosensory cortex. • Describe the functional difference between free nerve endings and Pacinian corpuscles. • Explain how fast adapting skin receptors (e.g., Pacinian corpuscles) differ from slow adapting skin receptors in terms of someone poking you versus leaning on you. • Explain why destruction of a single dorsal root in the spinal cord does not usually result in sensory loss. • Explain why damage to the somatosensory cortex or thalamus can result in a loss of touch and proprioception from the opposite side of the body whereas damage to the spinal cord can result in a loss of touch and proprioception from the same side of the body. • Compare and contrast the anatomy and function of the 2 major ascending
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somatosensory cortex, primary somatosensory cortex, Somatosensory Systems Objectives