The Shoulder Flashcards
retract elevate, and rotate scapula downward, as well as fix it to thoracic wall are actions of the muscle?
Rhombiod Major and Minor
-lateral third of clavicle (anterior), acromion, and spine of scapula are the distal attachment of what muscle?
Distal Attachment of the trapezius:
Grade 3 separated shoulder
both acromioclavicular and coracoclavicular ligaments are torn
innervation of subscapularis
-upper and lower subscapular nerves
the_______ muscle initiates adduction
supraspinatus
What is the innervation of the trapezius
motor: accessory nerve/CN11
sensory: C3/C4 spinal nerves.
What are the sections of the deltoid?
Anterior (clavicular)
middle
Posterior (spinal)
What muscle does not move the limb but rather stabilizes the clavicle.
subclavius
Distal attachment of the Rhombiod Major and Minor
- r. major: medial border of scapula from level of spine to inferior angle
- r. minor: medial end of scapular spine
-lesser tubercle of humerus is distal Attachment of what muscle?
subscapularis
-middle facet of greater tubercle of humerus is distal Attachment of what muscle?
infraspinatus
_______ are “pillows” of synovial fluid between muscle and joint capsule and/or bone and joint capsule.
bursa
-protracts scapula, rotates scapula, holds
scapula against thorax
Allows full abduction of humerus; arms raised above head aer actions of what muscle?
serratus anterior
innervation of Teres Major
-lower subscapular nerve
innervation of deltoid
axillary nerve
-posterior tubercles of transverse processes of first 4 cervical vertebrae is Proximal attachment of what muscle?
levator scapulae
• Hyperextension with lateral rotation
• Humeral head is forced in an infero-anterior
direction
• Fibrous layer of joint capsule and glenoid
labrum may tear\
- injury to axillary nerve
anterior dislocation of the glenohumeral joint
Dislocations in the ________ joint Rarely occur because this is such a strong joint
sternoclavicular joint
The following structures contribute to the________ joint:
- acromion
- clavicle (acromion end)
- coracolavicular lig.
- trapezoidal lig.
- coronoid lig.
- coracoacromial lig.
acromioclavicular
What innervates the latissimus dorsi?
thoracodorsal nerve
The only “true” boney articulation between upper limb & thorax.
Sternoclavicular Joint
-medial border of scapula, superior part of scapular spine is Distal attachment of what muscle?
levator scapulae
-middle part of lateral border of scapula Proximal Attachment of what muscle?
teres minor
-lateral lip of intertubercular sulcus (bicipital groove ) is Distal Attachment of what muscle?
pectoralis major
What muscle of the rotator cuff attaches to the lesser tubercle?
subscapularis
\_\_\_\_\_\_ ligament has 2 parts: •superior acromioclavicular ligament • inferior acromioclavicular ligament • coracoclavicular ligaments - conoid ligament -trapezoid ligament
Acromiocclavicular
What innervates the rhomboid minor
dorsal scapular nerve
Damage to long thoracic nerve of the serratus anterior muscle causes the portusion of the Medial border of scapula
Medial Winging of Scapula
-extends, adducts, and medially rotates humerus; raises torso towards arms during climbing are actions of what muscle?
Latissimus dorsi
-flexes, medially rotates, abducts, extends, and laterally rotates humerus are actions of what muscle?
deltoid
The intrinsic shoulder muscles are also known as……
scapulohumeral muscles
-anterior surface of medial border of scapula Distal Attachment of what muscle?
serratus anterior
-external surfaces of lateral parts of ribs 1-9 Proximal Attachment of the what muscle?
serratus anterior
Grade 1 separated shoulder
acromioclavicular ligament sprain
-spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 ribs is Proximal Attachment of what muscle?
latissimus dorsi
-works with deltoid in abduction of humerus, acts with other rotator cuff muscles in stabilizing shoulder joint are actions of what muscle?
supraspinatus