Central nervous system: motor mechanisms.

Publications that might be included under the above title appear at an overwhelming, accelerating rate. For example, articles on muscle receptors alone totaled 575 in the last ten-year period as compared to 137 in the pre­ vious decade. From this abundance the authors have chosen to concentrate on aspects of segmental involvement in motor control, and in the organiza­ tion of supraspinal influence on motor activity. Much relevant literature on cellular aspects of spinal reflexology, not mentioned here, has been exten­ sively reviewed in several books (1-4) or covered elsewhere in this volume.