BIOB34H3 Lecture Notes - Filum Terminale, Conus Medullaris, Lumbar Vertebrae
Document Summary
The spinal cord and spinal nerves: the spinal cord is in a canal formed by the vertebral foramina, vertebral ligaments also protect. Fat in the epidural space between wall of vertebral canal and meninges. Meninges (spinal meninges), cover cord and spinal nerves until they exit vertebral column: external anatomy. Extends from brain to second lumbar vertebra: cervical enlargement, nerves to and from upper limbs arise from this area, lumbar enlargement, nerves to and from lower limbs arise from this area. Two grooves: anterior median fissure, posterior median sulcus. Conus medullaris: end of cord tapers to a cone shape. Filum terminale: extension of pia mater attaches cord to coccyx. Cauda equina: some nerves exit the spinal cord and continue down the vertebral column to exit farther down. Dorsal and ventral roots fuse to form spinal nerves: internal anatomy. Rapid, predictable motor response to a stimulus. A segment of skin served by cutaneous branches of a particular spinal nerve (all except c1)
