2- Equine Musculoskeletal 1 Flashcards
Label the diagram
1) Deep pectoral
2) Superficial pectoral
3) Sternum
Label the diagram
1) Rhomboideus
2) Serratus ventralis
3) Serratus ventralis
Label the diagram (lateral view)
1) Supraspinatus
2) Infraspinatus
What is the OIA of supraspinatus m.?
O: Supraspinous fossa
I: Greater and lesser tubercles of humerus
A: Extend and laterally stabilize the humeral joint
What is the OIA of infraspinatus
O: Infraspinatus fossa
I: Superficial tendon- on the greater tubercle of the humerus
I: Deep tendon- on the caudal eminence of greater tubercle
A: Laterally stabilize the humeral joint
Label the diagram
1) Subclavius (not in dogs or cats!!)
2) Deltoideus
What is the OIA of deltoideus
O: Caudal border of scapula
I: Deltoid tuberosity
A: Flex the humeral joint
**Equine scapula does not have acromion, don’t have acromial part like in dog
What is the OIA for Subclavius m.
O: Cranial part of the sternum closely associated to supraspinatus m.
I: Supraspinatus muscle epimysium
A: Covers the jugular vein cranially
**Not in dogs or cats
Label the diagram
1) Subscapularis
2) Teres major
What is the OIA for subscapularis?
O: Subscapular fossa
I: Lesser tubercle of the humerus
A: Medially stabilize the humeral joint
What is the OIA of Teres Major?
O: Caudal angle of the scapula and adjacent border of scapula
I: teres major tuberosity of humerus
A: Flex humeral joint
Label the diagram
1) Intertubercular bursa
2) Biceps Brachii
3) Lacertus fibrosus
What is the OIA of biceps brachii
O: Supraglenoid tubercle
I: Intertubercular bursa
A: Flex the cubital joint, extend the humeral joint
What is the Intertubercular bursa?
Located between the tendon of origin of biceps brachii and the Intertubercular grooves of the humerus
What is the lacertus fibrosis
- Tendinous insertion of biceps brachii on the extensor carpi radial is m.
- part of the stay apparatus
- like a rubber band to flex the cubital joint
***Very hard upon palpation, feels almost like a bony prominence
Label the diagram
1) Biceps brachii
2) Extensor carpi radialis
3) Lacertus fibrosus
Label the diagram of heads of triceps brachii
1) long head
2) Medial head
3) Long head
4) Lateral head
**no accessory head in horses
What is the OIA for triceps brachii?
O- Long head: caudal border of the scapula
O- Lateral head: deltoid tuberosity
O- Medial head: medial aspect of humerus
I: olecranon tuber
A: extend the cubital joint and flex the humeral (long head)
Label the diagram
1) Extensor Carpi Radialis
2) Common digital extensor
What is the OIA of extensor carpi radialis?
O: Lateral supracondylar crest of the humerus
I: Metacarpal tuberosity
A: Extend and fix the carpus and flex the elbow joint
Which nerve innervates the extensor carpi radialis?
Radial n.
What is the OIA of the common digital extensor?
O: Lateral epicondyle of the humerus
I: Extensor process of distal phalanx and dorsal surface of proximal and middle phalanges
A: Extend the carpus and digit and flex the elbow joint
Which nerve innervates the common digital extensor?
Radial n.
Label the diagram
1) Lateral Digital Extensor
2) Extensor carpi ulnaris (Ulnaris Lateralis)
What is the OIA for lateral digital extensor?
O: Lateral tuberosity of the radius, lateral collateral ligament of the elbow
I: Dorsal aspect of proximal phalanx
A: Extend the carpus and digit
What nerve innervates the lateral digital extensor?
Radial n.
What is the OIA of extensor carpi ulnaris (ulnaris lateralis)? This is a weird one
O: Lateral epicondyle of the humerus
I: Short tendon- accessory carpal bone
I: Long tendon- metacarpal bone IV
A: FLEX and abduct the carpus
Notice it is opposite from the name
What nerve innervates the extensor carpi ulnaris?
Radial n.
Label the diagram
1) Flexor carpi ulnaris
2) Flexor carpi radialis
What is the OIA of flexor carpi ulnaris?
O- Humeral head: medial epicondyle of the humerus
O- Ulnar head: Olecranon
I: Accessory carpal bone
A: Flex the carpus and extend the elbow joint
What nerve innervates flexor carpi ulnaris?
Ulnar n.
What is the OIA of flexor carpi radialis?
O: Medial epicondyle of the humerus
I: Metacarpal bone II
A: Flex the carpus and extend the elbow joint
Which nerve innervates the flexor carpi radialis?
Median n.
Red? Green?
Green: Superficial digital flexor
Red: Deep digital flexor
What is the OIA of SDF?
O: Medial epicondyle of the humerus and radius (proximal accessory ligament)
I: Flexor surfaces of proximal and middle phalanges
A: Flex the digit (proximal interphalangeal joint) and carpus and extend the elbow joint
What nerve innervates the SDF?
Ulnar n.
What is the OIA of DDF?
O- Humeral head: medial epicondyle of the humerus (distal accessory ligament)
O- Ulnar head: Olecranon
O- Radial head: radius
I: Flexor surface of the distal phalanx
A: Flex the digit and carpus and extend the elbow joint
What nerve or nerves innervates the DDF?
Median and ulnar nn.
Name the 4 anatomical areas of the suspensory ligament
Blue- proximal
Purple- mid body
Yellow- branches
Green- extensor branches
Orange- distal sesamoidean ligaments
What is another name for the suspensory ligament?
Interosseous muscle
