Motor function is one of the three neurologic responses assessed by the Glasgow Coma Scale (GCS).
This response is scored on a scale of 1 to 6, 6 being the best score:
6 = Obeys commands (does simple things as asked).
5 = Localizes to pain (purposeful movements towards painful timuli; e.g., hand crosses mid-line and gets above clavicle when supra-orbital pressure applied).
4 = Flexion/Withdrawal to pain (flexion of elbow, supination of forearm, flexion of wrist when supra-orbital pressure applied. (i.e. pulls part of body away when nailbed pinched)).
3 = Abnormal flexion to pain (adduction of arm, internal rotation of shoulder, pronation of forearm, flexion of wrist, decorticate response).
2 = Extension to pain (adduction of arm, internal rotation of shoulder,pronation of forearm, extension of wrist, decerebrate response).
