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Gross Anatomy Unit 5
Anterior thoracic wall
36
Health Care
Undergraduate 4
05/23/2009

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Term
Medially: the manubrium of the sternum;
Laterally: the acromion process of the scapula
Definition
What two bones articulate with the clavicle and where does they articulate?
Term
Medially = Convex
Definition
Is the clavicle convex or concave medially?
Term
Laterally = Concave
Definition
Is the clavicle convex or concave laterally?
Term
The manubrium
The sternal angle
The Xiphosternal junction
Definition
What are the three main parts of the sternum?
Term
The clavicle
The first two ribs
The body of the sternum
Definition
Where does the manubrium of the sternum articulate?
Term
It is the junction of the manubrium and the body of the sternum
Definition
The sternal angle is the junction of what two parts of the sternum?
Term
The sternum
Definition
What is the only other part of the body with which the xiphosternal junction articulates?
Term
The jugular notch
Definition
What is the name of the superior aspect of the manubrium at the level of the intervertebral disk between T2 and T3?
Term
12 pairs
Definition
How many pairs of ribs are in a normal human skeleton?
Term
True ribs are attached to the sternum
Definition
What characteristic distinguishes a true rib from a false rib?
Term
7 pairs
Definition
How many pairs of ribs are true ribs?
Term
5 pairs
Definition
How many pairs of ribs are false ribs?
Term
Cartilaginous joint
Definition
What type of joint is the articulation of the first rib with the sternum?
Term
Synovial joint
Definition
What type of joint is the articulation of ribs 2-7 with the sternum?
Term
It separates the grooves for the subclavian artery and vein
Definition
What is the purpose of the scalene tubercle on the first rib?
Term
They have no osseous or cartilaginous attachments anteriorly
Definition
Why are ribs 11 and 12 called "floating ribs"?
Term
The axillary tail
Definition
What is the name of the lateral process of the breast?
Term
The pectoralis major and the serratus anterior muscles
Definition
The breast lies on what two muscles?
Term
The lactiferous duct
Definition
What structure drains the lobes of the mammary glands in the breast?
Term
The 4th intercostal space
Definition
Where is the nipple located in males and prepubescent girls?
Term
Areola
Definition
What is the name of the pigmented area around the nipple?
Term
Suspensory ligaments
Definition
What is the name of the connective tissue strands separated in lobules that run through the breast and connect skin to the fibrous stoma of the mammary gland?
Term
Most of it drains into the axillary nodes;
The rest drains medially to the parasternal (internal thoracic) nodes, to the opposite breast, or inferiorly to the abdomen
Definition
Where does lymph from the breast drain?
Term
1. Internal thoracic artery
2. Posterior intercostal arteries
3. Pectoral branch of the thoracoacromial artery
4. Lateral thoracic artery (or the lateral mammary artery)
Definition
What are the four main arteries that supply blood to the breast?
Term
Pectoralis major and minor
The serratus anterior
The subclavius
Definition
What are the muscles of the thoracic wall that are associated with the upper extremity?
Term
The external, internal, and innermost intercostal muscles
The transverses thoracic muscle
Definition
What are the muscles of the thoracic wall that are associated with the thoracic cage?
Term
The ventral primary rami
Definition
The skin of the anterolateral thoracic wall and the muscles are supplied by branches of what nerve?
Term
True
Definition
True or False: The lower cervical nerves do NOT contribute to the cutaneous innervation of the anterior trunk
Term
The supraclavicular nerves (C3 and C4) branches of the cervical plexus
Definition
What nerves supply the skin of the lower neck, top of the shoulder, and the area just inferior to the clavicle?
Term
The fibers are carried in the intercostal nerves which run in the costal grooves
Definition
Where are sensory fibers to the thoracic dermatomes carried and where do they run?
Term
The lateral cutaneous branch of each intercostal nerve
Definition
What sends fibers anteriorly and posteriorly around the anterolateral body wall?
Term
Upper extremity = branches of the brachial plexus
Thoracic cage = intercostal nerves
Definition
The muscles of the anterior thoracic wall are innervated from what two sources?
Term
The thoracic aorta, the subclavian artery, and the axillary artery
Definition
What are the three major sources of blood for the skin and muscles of the thoracic wall?
Term
1. The segmental arteries
2. The nonsegmental arteries
Definition
The branches of the thoracic wall arteries are divided into what two groups?
Term
1. The posterior intercostal arteries
2. The highest (superior) intercostal artery
3. The anterior intercostal arteries
Definition
What are the three subgroups of the segmental arteries?
Term
1. The superior thoracic artery
2. The thoracoacromial artery
3. The lateral thoracic artery
4. The thoracodorsal artery
Definition
What are the four subgroups of the nonsegmental arteries?
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