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Sensory neurons (afferent neurons) are unipolar, bipolar, or multipolar shaped cells that conduct action potentials toward or into the central nervous system. They carry somatic nervous system signals from the skin, joints, skeletal muscles, sensory organs (eyes, ears, mouth, and nose). They also carry autonomic nerous system signals from the visceral organs (heart, lungs, vessels, etc).
SENSORY NEURONS SYNAPSE WITH EXCITATORY INTERNEURONS. EXCITATORY INTERNEURONS STIMULATE AMN THAT INNERVATE FLEXOR MUSCLES CAUSING WITHDRAWAL OF LIMB. COLLATERAL BRANCHES OF SENSORY NEURONS SYNAPSE WITH EXCITATORY INTERNEURONS THAT CROSS TO THE OPP SIDE OF THE SC & STIMULATE AMN OF THE EXTENSOR MUSCLES OF THE OPPOSITE LIMB TO CONTRACT. WHAT DOES THE DORSAL ROOT CONNECT TO.