BMS 301 Lecture Notes - Foramen Magnum, Brainstem, Thoracic Vertebrae
Document Summary
Height vertebral column is attributed to discs. Made up of concentric rings anulus fibrous. Disc is supported anteriorally by thicker anulus fibrous, broader anterior longitudinal ligament; posteriorally by thinner anulus fibrous, thinner posterior longitudinal ligament. Nucleus is squeezed when picking things up using back. Disc problems usually unilateral; back muscle problems usually both sides. Disc injury most common at l4, l5; next most common is cervical region. Herniation between l4 and l5 impacts l5 spinal nerve. Motor supply from ventral rami of spinal nn. Motor supply from dorsal rami of spinal nn. Sp of thoracic vertebrae tp of cervical vertebrae + skull. At base is one mass of muscle, splits higher into 3 sections. Some go to next up, some skip one, some skip 2, and so on. Stereotyped (repeats itself the same way each time) motor event driven by a sensory stimulus.
