1 Bones (Clavicle, Scapula & Humerus) Flashcards
Practice an oral presentation of the clavicle.
Location: spans the anterior superior chest wall between the sternum and the lateral scapula. forms part of the pectoral girdle
Structure: flat bone
Function:
anchors and depresses clavicle
Surfaces:
superior (smooth)
inferior (rough)
Shape: medial two thirds convex anteriorly, and lateral third concave anteriorly
Articulates with the sternum and the first rib at the medial end, forming the sternoclavicular joint (sternal facet)
Articulates with the acromion process of the scapula at the lateral end, forming the acromioclavicular joint (acromial facet)
4 Attachments (from medial to lateral):
impression for costoclavicular ligament on the inferior surface near the sternal end
subclavian groove on the inferior surface (middle) for the insertion of the subclavius muscle
conoid tubercle on the inferior surface for the insertion of the conoid ligament (coracoclavicular ligament)
trapezoid line on inferior surface for the insertion of the trapezoid ligament (coracoclavicular ligament)
Practice an oral presentation of the scapula
Location: forms part of the shoulder girdle, located on the posterior and lateral surface of the body
Structure: flat bone ( & describe whether sample is a left or right scapula)
Function:
articulates with the humerus to form the glenohumeral joint. contributes to the stability of the glenohumeral joint, and contributes to the biomechanics of the glenohumeral joint.
articulates with the clavicle to form the acromioclavicular joint
position of the anterior scapular surface against the thoracic ribcage forms an informal ‘scapulothoracic joint’ (not a true joint as the bones are not connected)
3 borders:
Superior
Medial
Lateral
3 angles:
Superior
Inferior
Lateral
2 surfaces:
Anterior
Posterior
Bony landmarks: Spine of the scapula Scapular notch Head of the scapula Neck of the scapula Acromion Process Coracoid process Glenoid fossa (glenoid labrum) Supraglenoid tubercle Infraglenoid tubercle
Attachments:
supraspinous fossa for the insertion of the supraspinatus muscle
infraspinous fossa for the insertion of the infraspinatus muscle
subscapular fossa for the insertion of the subscapularis muscle
Practice an oral presentation of the humerus
Location: the only bone in the brachium
Structure: long bone, identify diaphysis, metaphysis, and epiphysis (& identify whether sample is left or right)
Articulates with scapula to form the glenohumeral joint
Articulates distally with radius to form the humeroradial joint, and the ulna to form the humeroulnar joint
Surfaces:
posterior
anterolateral
Proximal features: Head of the humerus Surgical neck of the humerus Anatomical neck of the humerus Greater tubercle Lesser tubercle Bicipital groove Deltoid tuberosity Radial groove
Distal features: Lateral supracondylar ridge Lateral epicondyle Radial fossa Capitulum Olecranon fossa
Medial supracondylar ridge
Medial epicondyle
Coronoid fossa
Trochlea