SPINAL CORD Nolte, pp Department of Anatomical Sciences

ROOT FILAMENTS SPINAL NERVE

DERMATOME: CUTANEOUS AREA RECEIVING ITS SENSORY INNERVATION FROM ONE SPINAL NERVE

SPINAL CORD SEGMENTS: CERVICAL THORACIC LUMBAR SACRAL COCCYGEAL CONUS MEDULLARIS

NOTE THE ARRANGEMENT OF GRAY AND WHITE MATTER AT DIFFERENT SPINAL CORD LEVELS 1. cervical spinal segments contain the largest number of fibers in the white matter 2. gray matter is maximal in the cervical and lumbar enlargements

GRAY MATTER WHITE MATTER

* **    white matter gray matter

alpha and gamma motor neurons

THE CELL GROUPS THAT COMPRISE THE GRAY MATTER OF THE SPINAL CORD ARE ARRANGED AS COLUMNS OF CELLS. THE ADJACENT CHART SHOWS THE LONGITUDINAL EXTENT OF THESE CELL COLUMNS

BLUE=ASCENDING RED=DESCENDING PURPLE= ASCENDING AND DESCENDING

BLUE=ASCENDING RED=DESCENDING PURPLE= ASCENDING AND DESCENDING