Figure 13. Absent blood pressure raising reflex emanating from leg muscles during volitional exercise in a participant with a spinal cord lesion.

Line charts displaying the changes in arterial blood pressure associated with about five minutes of volitional exercise with concurrent occlusion of leg blood flow using suprasystolic sphygmomanometer cuff around the proximal thigh in a participant with a unilateral spinal cord lesion. The spinal cord lesion was associated with unilateral sensory loss on the right leg (insensitive leg; blue line) with no loss of sensation in the left leg (control leg; red line) and normal muscle power in both lower limbs. Adapted from Alam and Smirk 1938 (4).