Spinal Reflexes and Seizure Patterns in the Two-Toed Sloth

Science  05 May 1961:
Vol. 133, Issue 3462, pp. 1426-1427
DOI: 10.1126/science.133.3462.1426


In striking contrast to the seizure patterns of other animals, the electroshock seizure of the sloth consists of weak extension followed by tonic flexion and terminal clonus. A similar pattern is seen with direct spinal cord stimulation. Strychnine produces a pure flexor convulsion. In the spinal sloth, painful stimulation of one foot causes extension at some joints of that limb and strong flexion at all joints of the contralateral limb.