ANAT 215 Lecture Notes - Lecture 24: Lumbar Vertebrae, Cervical Vertebrae, Thoracic Vertebrae

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 215
• Professor: Leslie W Mac Kenzie

Document Summary

Vertebral column (spine) (reading materials: chapter 6: pages 164-174; chapter 8: pages 220-222) Vertebral column (spine): general characteristics: vertebrae (24) sacrum (1) coccyx (1) 26 bones: approximately 70 cm long in average adult consists of five regions: 4 spinal curvatures: cervical (7 vertebrae) thoracic (12 vertebrae) lumbar (5 vertebrae) sacral form pelvis with coccyx coccygeal. Gives spine the shape of the letter s thoracic sacral primary: Curvatrure of the spine in the developing fetus, fits the environment it grows in secondary: (concave posteriorly) Cervical forms first (3-4 months when baby"s muscles can hold up head) When baby can stand, development of lumbar curvature develops cervical lumbar. All 24 vertebrae will share these, but there are differences. ***regional variation know the differences between sections of the spine. C1 and c2 are atypical: ring of bone lateral masses-- 2 articulating surfaces which are the only point of contact between the spine and the skull receiving the occipital condyles.