ch 10- shoulder joint bony landmarks and muscles Flashcards
what motion is occuring?
shoulder flexion: 0 to 180 degrees; sagittal plane around frontal axis
what motion is occuring?
shoulder hyperextension: 45 degrees from anatomical position; sagittal plane around frontal axis
what motion is occuring?
shoulder abduction: frontal plane around sagittal axis with 180 degrees of motion
what motion is occuring?
shoulder adduction: frontal plane around sagittal axis with 180 degrees of motion
what motion is occuring?
circumduction: combination of all shoulder motions
what motions are occuring?
medial and lateral rotation: transverse plane around vertical axis
what motion is occuring?
shoulder horizontal abduction: transverse plane around vertical axis
what motion is occuring?
shoulder horizontal adduction: occurs in transverse plane around vertical axis
what motion is occuring?
scaption: occurs in scapular plane approximately 30 degrees forward of frontal plane
what bony landmark is highlighted?
gelnoid fossa: shallow, egg-shaped socket on the superior end, lateral side: articulates with the humerus
what deepens this bony landmark?
glenoid labrum: fibrocartilaginous ring attached to the rim of glenoid fossa, which deepens the articular cavity
what bony landmark is colored?
supraspinous fossa: above the spine, providing attachment for the supraspinatus muscle
what bony landmark is colored?
infraspinous fossa: below the spine, providing attachment for the infraspinatus muscle
what bony landmark is colored?
subscapular fossa: includes most of the area on the anterior (costal) surface, providing attachment for the subscapularis muscle
what bony landmark is highlighted?
axillary border: providing attachment for teres major and minor muscles
what bony landmark is highlighted?
acromion process: broat, flat area on the superior lateral aspect, providing attachment for the middle deltoid muscle
what bony landmark is highlighted?
head: semirounded proximal end; articulates with the scapula
what bony landmark is highlighted?
anatomical neck: circumferential groove separating the head from the tubercle
what bony landmark is highlighted?
surgical neck: slightly constricted area just below tubercles where the head meets the body
what bony landmark is highlighted?
shaft: “body”; area between the surgical neck proximaly and wider distal end
what bony landmark is highlighted
greater tubercle: large projection lateral to head and lesser tubercle, provides attachment for the supraspinatus, infraspinatus, and teres minor muscles
what bony landmark is highlighted?
lesser tubercle: smaller projection on the anterior surface, medial to the greater tubercle; provides attachment for the subscapularis muscle
what bony landmark is highlighted?
deltoid tuberosity: on the lateral side near the midpoint of the shaft, not usually a well defined landmark
what bony landmark is highlighted?
bicipital groove: intertubercular groove: the longitudinal groove between the tubercles, containing the tend of the long head of the biceps
what ligament is in red?
coracohumeral ligament: attaches from lateral side of the coracoid process and spans the joint anteriorly to the medial side of the greater tubercle; strengthens upper part of joint capsule
what ligament is in blue?
glenohumeral ligaments: superior, middle and inferior; reinforce the anterior portion of capsule
what is labeled 1?
subacromial bursa: lies between the acromion and coracoacromial ligament, between them and the joint capsule
what is labeled 2?
subdeltoid bursa: large and located between the deltoid muscle and joint capsule
what is circled?
thoracolumbar fascia: lumbar aponeurosis; superficial fibrous sheet that attaches to the spinous processes of the lower thoracic and lumbar vertebrae, the supraspinal ligament, and the posterior part of the iliac crest, covering the sacrospinalis muscle; provides a very broad attachemnt for the latissimus dorsi muscle
what muscle is highlighted and line of pull?
anterior deltoid; horizontal line of pull
what is the green muscle and line of pull?
middle deltoid; vertical
what is the blue muscle and line of pull?
posterior deltoid; oblique, horizontal line of pull
what muscle is highlighted and line of pull?
pectoralis major; clavicular portion: vertical line of pull in extendsion and horizontal line of pull at shoulder level; sternal portion: vertical line of pull in flexion
what muscle is highlighted and line of pull?
latissimus dorsi;
what muscle is highlighted and line of pull?
teres major; horizontal
what muscle is highlighted and line of pull?
supraspinatus; horizontal
what muscle is highlighted and line of pull?
teres minor; oblique and outward
what muscle is highlighted and line of pull?
infraspinatus; horizontal
what muscle is highlighted and line of pull?
subscapularis; horizontal
what muscle is highlighted and line of pull?
coracobrachialis; vertical
