Chapter 8 Flashcards
Appendicular Skeleton
bones of the extremities and shoulder and pelvic girdles
Pectoral Girdle
- definition
- 2 parts
- (shoulder) attaches bones of the upper extremities to the axial skeleton
- Clavicle
- Scapula
- Clavicle
Clavicle
- Number of bones
- description
- 2 articulations
- 2
- collarbone, slender S-shaped bone
- Sternoclavicular joint
- Acromioclavicular joint
- Sternoclavicular joint
Sternoclavicular joint
Clavicle articulates medially with the manubrium of the sternum
Acromioclavicular joint of the clavicle
clavicle articulates laterally with the acromion process of scapula
Scapula
- number of bones
- description
- 5 special features
- 2 articulations
- 2
- shoulder blade; flat triangular bone in dorsal thorax
- Borders
- Spine
- Acromion process
- coracoid process
- Glenoid cavity
- Borders
- Acromioclavicular joint
- Shoulder joint
- Acromioclavicular joint
Borders of the scapula
- superior
- medial (vertebral)
- lateral (axillary)
Spine of the scapula
Sharp diagonal ridge on posterior surface
Acromion process
Expanded process at lateral end of spine
Coracoid process
Hook-like process on lateral end of superior border
Glenoid cavity
Depression below acromion (arm socket)
Upper extremity
- Humerus
- ulna
- radius
- carpals
- metacarpals
- phalanges
Humerus
- number of bones
- description
- 2
- long bone of upper arm
Proximal features of the humerus
-4
- Head
- Greater tubercle
- Lesser tubercle
- Deltoid tuberosity
Head of the humerus
rounded enlargement at proximal end
Greater tubercle of the humerus
lateral projection distal to head
lesser tubercle of the humerus
projection on anterior surface
deltoid tuberosity of the humerus
roughened area along middle of shaft
Distal features of the humerus
-5
- Medial and lateral epicondyles
- capitulum
- Trochelea
- Coronoid fossa
- Olecranon fossa
Medial and lateral epicondyles
Rough projections on either side
Capitulum
rounded knob below lateral epicondyle on anterior surface
Trochelea
pulley-like process on anterior surface
Coronoid fossa
Depression on anterior surface above trochelea
Olecranon fossa
depression on posterior surface above trochelea
Proximal articulation of humerus
humerus articulates with glenoid cavity of scapula
Distal articulation of humerus
- capitulum
- trochelea
- capitulum of humerus articulates with head of radius
- trochelea of humerus articulates with ulna
Ulna
- number of bones
- description
- 2
- medial bone of forearm
Proximal features of the ulna
-3
- olecranon process
- Coronoid process
- Radial notch
Olecranon process
Superior process that forms point of elbow
Coronoid process
Anterior projection
Radial notch
Lateral depression
Distal features of the ulna
-2
- head
2. Styloid process
Styloid process of the ulna
short pointed process
Proximal articulation of the ulna
coronoid process and olecranon process articulate with the trochelea of humerus
Distal articulation of the ulna
ulna articulates with the carpals
Radius
- number of bones
- description
- 2
- small lateral bone of the forearm
Proximal features of the radius
Head
Head of the radius
Flat, disc shaped process
Distal features of the radius
Styloid process
Styloid process of the radius
Pointed lateral projection
Proximal articulation of the radius
- head of radius articulates with capitulum of humerus
- head of radius articulates with radial notch of ulna
Distal articulation of the radius
Radius articulates with carpals