Lab 2 Clavicle, ribs, sternum, vertebrae Schroeder PDF

Preview

Summary

Lab assignment...

Description

ANTH 3404 Winter 20201 Lab 2: submit this file Clavicle Indicate all articulations: medial end articulates with the clavicular notch of the manubrium and the lateral end articulates with the acromial process of the scapula Ribs Indicate all articulations: all ribs articulate with their proximal ends to the thoracic vertebrae. Ribs 1-7 articulate with the sternum by cartilage. Ribs 8-10 interconnect medially by cartilage that attaches to the sternum. Which ribs are the: 1) True ribs? Ribs 1-7 2) False ribs? Ribs 8-10 3) Floating ribs? Ribs 11 & 12 Special ribs: 1) First rib (R1) a) What does this rib articulate with? i) T1 vertebrae b) What features distinguish it from other ribs? i) Smaller than the other ribs ii) Thicker than the other ribs iii) The grooves are different - for the subcranial vein and artery iv) One facet on the head to articulate with the vertebrae v) The head is smaller 2) Second rib (R2) a) What does this rib articulate with? i) T1 & T2 vertebrae b) What features distinguish it from other ribs? i) On the superior surface, the depression and tuberosity for the serratus anterior muscle 3) Eleventh rib (R11) a) What does this rib articulate with? i) T11 vertebrae b) What features distinguish it from other ribs? i) Lacks the tubercle ii) Sternal portion is more pointed 4) Twelfth rib (R12) a) What does this rib articulate with? i) T12 vertebrae b) What features distinguish it from other ribs?

i) ii) iii) iv)

One facet Shorter than the 11th rib and at times shorter than the first ib No pronounced angle No costal groove

Sternum Indicate all articulations: clavicle and the ribs Which ribs articulate with the: 1) Manubrium? a) Ribs 1 & 2 2) Corpus sterni? a) Ribs 3-7 3) Xiphoid process? a) Rib 7 through costal cartilage Vertebrae Indicate all articulations: The first cervical vertebrae articulates with the occipital condyles of the occipital bone. The 12 thoracic vertebrae articulate with the ribs. The vertebrae articulate with the vertebrae below and above one another Cervical vertebrae Identify five traits which are typical to cervical vertebrae 1) The transverse foramina 2) The body dips down into a saddle shape when it sits with the other cervical vertebrae 3) Spinous process - bifid 4) Transverse processes are quite small 5) The facets - the angle is different, both superior and inferior are on an angle Thoracic vertebrae Identify five traits which are typical to thoracic vertebrae 1) The body is shaped oval like 2) Articulate with the ribs - have notches on the side, demi facets a) On the lateral portions of the body 3) Transverse process have the articular facet where the tubercle articulates 4) Shape of the superior and inferior articular facets tend to be more straight 5) Spinous process is more larger Lumbar vertebrae Identify five traits which are typical to lumbar vertebrae 1) The body is much larger than the other vertebrae

2) 3) 4) 5)

The spinous process is much larger and more rounded The superior facets curve inwards and the inferior are more convex shaped The mamillary processes are an extra piece of bone by the superior facets Transverse processes are relatively smaller and thinner

Special vertebrae First cervical vertebra (C1) - also referred to as the atlas What does this vertebrae articulate with? The occipital bone and C2 What features distinguish it from other cervical vertebrae? Divot connects to the dens of the second cervical vertebrae. It also has no vertebral body, lacks a spinous process and has no articular disks superior or inferior to it. Second cervical vertebra (C2) - also referred to as the axis What does this vertebrae articulate with? C1 and C3 What features distinguish it from other cervical vertebrae? It has dens that connects to the atlas, projecting process and has no vertebral body. Seventh cervical vertebrae (C7) What does this vertebrae articulate with? C6 and T1 What distinguishes it from other cervical vertebrae? The inferior portion of the body is more flat to fit with T1, with the saddle on the superior portion. The spinous process is much longer and has no bifid. First thoracic vertebrae (T1) What does this vertebrae articulate with? C7 and T2 as well as the first rib What features distinguish it from other thoracic vertebrae? On the body there is one entire facet and a demi facet. It has cervical like characteristics in the spine and body (transition bone from cervical to thoracic) Tenth thoracic vertebrae (T10) What does this vertebrae articulate with? T9 and T11 and the 10th rib What features distinguish it from other thoracic vertebrae? Instead of demi facets, there is one large facet more superiorly placed and a facet on the

transverse process. Eleventh thoracic vertebrae (T11) What does this vertebrae articulate with? T10 and T12 and the 11th rib What features distinguish it from other thoracic vertebrae? One facet moved more inferiorly, not on the transverse process. No costal articulation on the transverse process. Twelfth thoracic vertebrae (T12) What does this vertebrae articulate with? T11 and L1 and the 12th rib What features distinguish it from other thoracic vertebrae? There is nothing on the transverse process and is beginning to look more like a lumbar vertebrae. The superior and inferior articular facets start to take shape and curve a bit....