Forelimb Osteology Flashcards
Forelimb / thoracic limb bones
scapula humerus radius & ulna carpals metacarpals phalanges
Brachium
arm
Antebrachium
forearm
Paw/Manus
hand
Describe the scapula
laterally compressed for muscle attachment
shoulder
synsarcosis
List characteristics of the humerus
large head articulates with scapula & faces caudally
brachium region
twisted shaft
Synsarcosis
join made of muscle
shoulder
Describe the radius
paired with ulna stout weight-bearing medial to ulna antebrachium
Describe the ulna
paired with radius
thin
lateral to radius
antebrachium
Carpal bones
7
top row: radial, intermediate fused, ulnar, accessory
bottom row: carpals 1,2,3
Metacarpal bones
MC1-5
1 = dew claw
numbers start medially
Phalanges
cylindrical P1, P2, P3
P3 includes claw
dorsal sesamoid on dorsal aspect of metacarpo-P1 joint
proximal sesamoids at palmar surface of metacarpo-P1 joint
small distal sesamoids at palmar surface of P2-P3 joint
Sesamoid
small bone embedded in joint or tendon
Shoulder joint
scapulo-humeral joint
synovial
spheroidal (ball & socket)
wide ROM
Elbow joint
humero-radial & humero-ulnar joints proximal radio-ulnar joint synovial limited ROM (flexion & extension)
