University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

133

Pages:

3
Author:

Mariam A. A.

Cervical vertebrae in depth Features - Found in the neck region - Movement of the head and neck - Articular surfaces are in a diagonal arrangement → allow forward and back, side to side movement, rotation Number - There are 7 cervical vertebrae - C3-C6 = typical - C1, C2, C7 = atypical Distinguishing features - Transverse foramen (passage of vertebral arteries that enter the cranial cavities and supply the brain) - Smallest and lightest - Body is bean shaped - Spinous process is short and projects horizontally Atypical vertebrae: C1 ‘Atlas’ - No body - No spinous process - Holds the skull and permits movements of the skull on top of the neck - Anterior and posterior arch - Superior articular facets are more rounded and oval shapes but the inferior articular facets are flatter - Superior articular facets articulate with the occipital condyles of the skull C2 - Head and C1 move around this DENS Tooth like process - like a tooth sticking up from the anterior part of the vertebrae Articulation between C1 and C2 = rotational actions of the head Head and C1 move around this DENS C7 - Long and inferiorly projecting spinous process Transitional takes on features of the thoracic one (long and sloped) Thoracic vertebrae Features - Attachment points for the ribs to create the thoracic cavity - Allow movement of the vertebral column and thoracic cage (respiration) - Articular surfaces are in an anterior and posterior position → allows side to side movement and rotation Number - There are as many ribs as there are vertebrate (12) - T2-T9 = typical - T1, T10, T11, T12 = atypical Distinguishing features (GIRAFFE ) - Costal facets (fingerprint) - Long inferiorly sloped transverse process - Evidence of articulation (marking to identify it) - Pedicle is very obvious (connects the body to the transverse process) - Body is heart shaped Ribs ● ● ● ● ● ● ● ● ● Curved bone Head on the posterior end articulates with the body of the thoracic vertebrae (moves as you breathe) Tubercle = elbow that rubs against the transverse process of the thoracic vertebrae Sternal end → there the costal cartilage will bridge the gap between the bone and sternum = flexibility for the thoracic cavity Grooves in the shaft = protect blood vessels and nerves if they're close to the surface We have 12 pairs of ribs 1-7 ‘True’ ○ Single rib with single cartilage connection ○ Costal cartilage (hyaline cartilage) connects the rib to the sternum 8-10 ‘False’ ○ Join the costal cartilage of 7 and join the path of rib 7 on the way up (hare attachment) 11-12 ‘Floating’ ○ No connection to the sternum ○ Free edge on the anterior part of the bone