Stay apparatus Flashcards
(21 cards)
What is the role of the M. biceps brachii in the shoulder joint?
Prevents collapse of the shoulder joint and maintains a constant angle
It consists of two parts: fusiform and pennate.
What are the secondary muscles assisting the M. biceps brachii in the shoulder joint?
- Mm. coracobrachialis
- Supraspinatus
- Latissimus dorsi
- Ascending pectoral
- Tensor fascia antebrachia
What is the function of the M. triceps brachii at the elbow joint?
Contracts all 4 components to bring the elbow joint in full extension
What is the role of the lateral collateral ligament in the elbow joint?
Locks the elbow in extension
What is the function of lacertus fibrosis at the elbow joint?
Assists extension of the elbow joint with a ‘bow-string’ effect
What is the main extensor of the carpus?
M. extensor carpi radialis
Name the secondary structures that assist in carpal extension.
- Mm. extensor carpi ulnaris
- Flexor carpi ulnaris
- Flexor carpi radialis
- Proximal and distal check ligaments
- Palmar ligament
What is the role of the Mm. extensor digitalis communis and lateralis at the fetlock joint?
Maintain extension and a straight digital/pastern axis
What supports the SDFT and DDFT in their actions?
Proximal and distal check ligaments
What are the components of the proximal suspensory apparatus in the front limb?
most important support of the fetlock joint
- M. interosseus
- Extensor branches
- Metacarpo-sesamoidean ligaments
- Intersesamoidean ligament
- Distal sesamoidean ligaments (rectus, oblique, cruciate, and brevis)
What is the main support function of the proximal suspensory apparatus ?
Support of the fetlock joint
What do all the muscles and ligaments in the front limbs prevent?
Sagittal collapse (cranio-caudal or dorso-palmar) and medio-lateral collapse
How is weightbearing different in the hind limbs compared to the front limbs?
Weightbearing is brief in hind limbs; mostly one limb is rested while the other bears weight
What keeps the hip joint in a constant angle?
Tone of the M. gluteus medius and profundus
What is the role of the M. quadriceps at the femero-tibial joint?
Extends the stifle joint and locks the patella
What assists the M. quadriceps in extending the hip and stifle?
- M. tensor fascia lata
- Tone of the hamstring muscles
What is the primary extensor of the tarsus?
M. gastrocnemius
What are the components of the reciprocal apparatus in the hind limb?
- Pennate SDFT (caudally)
- Fibro-ligamentous M. peroneus tertius (cranially)
What is the function of the reciprocal apparatus?
Allows simultaneous flexion and extension of the stifle and tarsus
What muscles are involved in the fetlock and digits of the hind limb?
- Mm. extensor digitalis longus
- Mm. extensor digitalis lateralis
- SDFT
- DDFT
What ligaments support the fetlock joint in the hind limb?
Collateral ligaments
