Structure and Functional Organization of the Upper Extremity MSK system Flashcards
What are the regions of the vertebral column?
cervical
thoracic
lumbar
coccyx
number of vertebrae in each region of the vertebral column
Cervical-7
Thoracic-12
Lumbar-5
Coccyx-4
Which vertebrae are lordotic?
cervical and lumbar
Which vertebrae are Kyphotic?
Thoracic and sacral
which vertebrae have facets for rib articulation?
Thoracic
What are the largest and strongest vertebrae?
the lumbar
What is the foundation for the pelvic girdle and contains foramina for nerves and blood vessels?
Sacrum
what has four vertebrae fused into one?
coccyx
What are the bones of the thorax?
Sternum
a. Manubrium
b. Body
c. Xyphoid process
Which ribs are true ribs?
R1-R7 are true ribs
Which ribs are false ribs?
R8-R10 are false ribs
Which ribs are floating ribs?
R11-R12 are floating ribs
Bones of the pectoral/shoulder girdle
Clavicle, Scapula
What is the “strut” between the scapula and sternum, articulates with the acromion laterally, and the sternum medially?
clavicle
What are the parts of the scapula?
Spine, body (vertebral border, axillary border), acromion (extends over humeral head), and the coracoid (attachment site)
What are the ligaments of the shoulder/pectoral girdle?
acromioclavicular ligament
coracoclavicular ligament
coracoacromial ligament
What is the ring called that deepens the glenoid cavity and provides stability?
labrum
What percentage of the humeral head makes contact with the glenoid cavity?
25%
What are the SITS muscles?
Supraspinatus, infraspinatus, teres minor, subscapularis
What is the action of the supraspinatus?
assists deltoid in abduction of the humerous at the shoulder
what is the action of the infraspinatus?
external rotation of the shoulder joint
What is the action of the teres minor
extends arm at shoulder, rotation externally
What is the action of the subscapularis?
internal rotation of the arm at the shoulder
What are the bones of the elbow?
Humerus
Radius
Ulna
What is the action of the biceps brachii?
flexes arm at shoulder
flexes and supinates forearm at elbow
What is the action of the brachialis?
flexes forearm at the elbow
what is the action of the brachioradialis?
flexes forearm at the elbow joint
what is the action of the triceps brachii
extends forearm at the elbow joint
extends arm at the shoulder
What is the action of the supinator?
supinates forearm
what is the action of the pronator teres
pronates forearm
