A&P II - Shoulder MG 1
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- The origin of the deltoid is identical to the insertion of which muscle?
- Trapezius
- What action can you ask your client to perform in order to contract all fibers of the deltoid?
- abduct the shoulder
- The actions of the deltoid's anterior and posterior fibers make it an __ to itself.
- antagonist
- The upper fibers of the trapezius elevate the scapula, so the lower fibers must __ the scapula.
- depress
- Bilateral contraction of the upper fibers of the trapezius will create what movement in the had and neck?
- extension
- To feel the middle fibers of the trapezius contract, you could ask your partner to perform which action?
- adduction of scapula
- Which portion of the latissimus dorsi is easy to grasp?
- middle portion
- When palpating the latissimus dorsi, hw can you discern the muscle tissue from the superficial skin.
- grasp tissue and let it slip through your fingers, feel for muscles fibrous texture
- One palpatory distinction between the teres major and the latissimus dorsi is that the teres attaches to the __ of the scapula.
- lateral border of the scapula
- Passive abduction of the scapula would __ the middle fibers of the trapezius
- lengthen
- Passive elevation of the scapula would __ the trapezius upper fibers and __ its lower fibers.
- shorten - lengthen
- Passive rotation of the head and neck to the left would __ the left trapezius' upper fibers.
- lengthen
- Passive flexion of the shoulder would __ the anterior fibers of the deltoid.
- shorten
- Passive lateral rotation of the shoulder would __ the deltoid's poster fibers.
- shorten
- Passive flexion of the should would __ the latissimus dorsi.
- lengthen
- Passive adduction of the shoulder would __ the teres major
- shorten
- Passive medial rotation of the shoulder would __ the latissimus dorsi and teres major.
- shorten
- Origin of Deltoid
- lateral one-third of clavicle, acromion and spine of the scapula
- Insertion of Deltoid
- deltoid tuberosity
- Origin of Latissimus Dorsi
- spinous process of last six thoracic vertebrae, last three or 4 ribs, thoracolumbar aponeurosis and posterior iliac crest
- Insertion of Latissimus Dorsi
- crest of the lesser tubercle of the humerus
- Origin of Teres Major
- lateral side of inferior angle and lower half of lateral border of scapula
- Insertion of Teres Major
- crest of the lesser tubercle of the humerus
- Origin of Trapezius
- external occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae and spinous processes of c-7 through t-12
- Insertion of Trapezius
- lateral one third of clavicle, acromion and spine of the scapula