Bones of the Thoracic Limb Flashcards
What is the scapula also called?
shoulder blade
the scapula is the basis of the shoulder region, and is described as
a flat bone lying over craniodorsal thorax
how is the scapula held in place
by muscles
What lies on top of the supraspinous fossa and the infraspinous fossa of the scapul?
muscles of the shoulder
What does the Glenoid cavity of the scapula articulate with
the head of the humerus
what is the other name for the upper arm/humerus
Brachium
What does the head of the humerus articulate with?
glenoid cavity of the scapula
What aspect is the greater tubercle of the humerus on?
lateral aspect
What aspect is the lesser tubercle of the humerus on?
medial
What muscle inserts at the deltoid tuberosity (of the humerus)
deltoideus muscle
What does the olecranon fossa of the humerus contain/recieve
contains foramen/receives the anconeal process of the ulna
What originates at the medial epicondyle of the humerus
the flexor muscles of the carpus and digits
What originates at the lateral epicondyle
extensor muscles or the carpus/digits
What does the Capitulum (lateral) of the Humerus articulate with??
the radius
What does the Trochlea (medial) articulate with?
the radius and the ulna
What muscles attach at the tuberosity for Teres Major on the Humerus?
Teres Major and Latissimus Dorsi muscles
What originates at the Brachialis Groove of the humerus?
Brachialis muscle
What attaches at the Tricipital line of the humerus?
Triceps muscle
The Radius and Ulna are bones of the __________ or ____________
Forearm or Antebracium
How is the Ulna and radius orientated proximally in the standing position
Ulna is caudal to the radius
How is the Ulna and radius orientated distally in the standing position?
Ulna is lateral to the radius
How is the radius and ulna held together?
by ligaments
rotational abilities
The radius is a rod like bone that articulates with what?th
the distal humerus
What does the circumferential facet of the radius articulate with?
the ulna
What does the articular facet of the radius articulate with?
the ulna
What structure does the Olecranon of the ulna make in a dog>
the proximal point of elbow
What attaches to the Olecranon of the ulna
triceps muscles
What does the anconeal process of the ulna fit into that is located on the humerus
the olecranon fossa of the humerus , proximal location
What does the distal articular facet of the ulna articulate with?
the radius
What does the lateral styloid process of the ulna articulate with
ulnar carpal bones
carpal bones make up part of the ______ or ________
Forepaw or manus
How many rows of carpal bones are there?
2 rows
What carpal bones are in the proximal rows (list medial to lateral)
radial, intermediate, ulnar, accessory
what carpal bones projects behind the carpus and is a landmark in a live animal
accessory bone
what two bones fuse in dogs and cats and are called the intermediolateral bone
radial and intermediate
what is the distal carpal bones listed as (medial to lateral)
Numbered 1-5 (in dogs and cats, no separate 5th bone. it is fused with the fourth)
How many metacarpal bones are present in dogs and how are they named
5 present in dogs, named with Roman Numerals from medial to lateral
What is the proximal aspect of the metacarpal bones called
Base
Articulates with distal row of carpal bones
What is the distal aspect of the metacarpal bones called
Caput
Articulates with the proximal phalanx
What dos the proximal phalanx bone articulate with?
Articulates with caput of metacarpal bones
What phalanx houses claw or nail via ungual process
Distal Phalanx
Where is the paired proximal sesamoid bones
located in metacarpophalangeal joint
How does the radius and ulna differ in equines compared to dogs and cats
radius and ulna are fused
What tendon allows cats to retract and protrude their claws
Deep digital flexor tendon
