Figure 1
From: Carpal tunnel syndrome and the "double crush" hypothesis: a review and implications for chiropractic
A: graphic representation of motor neuron, with two sites of compression along single axon. Proximal compression affects intraneural circulation and impulse transmission, with second compression more than doubling those effects. B: Graphic depiction of cell body of a sensory neuron. Axonal transport to and from the periphery is mechanistically separate from transport to and from the spinal cord. Compression of the proximal (left) branch is unlikely to affect transport for the distal (right) branch.