5: Distal Leg Arthrology (tendons, ligaments of thoracic and pelvic)

Radiocarpal

What is the joint labeled 1?

Intercarpal

What is the joint labeled 2?

Midcarpal

What is the joint labeled 3?

Carpomaetacarpal

What is the joint labeled 4?

Metacarpophalangeal

What is the joint labeled 1?

Proximal interphalangeal

What is the joint labeled 2?

Distal interphalangeal

What is the joint labeled 3?

What kind of joint is the radiocarpal joint?

hinge

What kind of joint is the intercarpal joint?

plane

What kind of joint is the midcarpal joint?

hinge

What kind of joint is the carpometacarpal joint?

plane

What kind of joint is the metacarpophalangeal joint?

hinge

What kind of joint is proximal interphalangeal joint?

saddle

What kind of joint is the distal interphalangeal joint?

saddle

Metacarpophalangeal joint (fetlock) has what kind of recesses?

-small dorsal recess

-large palmar recess

In this distal phalangeal joint you can access the joint via what pouches?

-dorsal pouch

-palmar process

Large palmar recess

What is starred in this picture?

Dorsal pouch

What is 1?

Palmar process

What is 2?

Superficial digital flexor

What is highlighted in green?

Deep digital flexor

What is highlighted in red?

What is the OIA for the superficial digital flexor?

O- medial epicondyle of the humerus and radius

I- flexor surfaces of the proximal and middle phalanges

A- flex the digit and carpus and extend the elbow joint

What is the SDF innervated by?

Ulnar nerve

What ligament runs with the SDF that is extremely important to know?

proximal accessory ligament

What is the OIA for the deep digital flexor?

O- Humeral head: medial epicondyle of the humerus

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 is the DDF innervated by?

Median and ulnar nerves

What is a very important tendon that runs with the DDF?

distal accessory ligament

Proximal accessory ligament

What is 1?

Distal accessory ligament

What is 2?

SDF tendon insertions

What is 3?

DDF muscle

What is 4?

SDF muscle

What is 5?

SDF tendon (cut)

What is 6?

DDF tendon

What is 7?

Manica Flexoria

What is 8?

DDF tendon insertion

What is 9?

What is the manica flexoria?

a tunnel to allow the DDF tendon to pass through the SDF tendon to reach the distal phalanx

Proximal scutum

What is 1?

Middle scutum

What is 2?

Distal scutum

What is 3?

What is the proximal scutum?

-fibrocartilagenous structure

-allows gliding

-same area as the proximal sesamoid bones

What is the middle scutum?

-fibrocartilagenous structure

-glide to final part of SDF

What is the distal scutum?

-fibrocartilagenous

-allow last part of DDF tendon to glide against bone

-goes over navicular bone

Common digital extensor muscle

What is 1?

Common digital extensor tendon

What is 2?

Lateral digital extensor tendon

What is 3?

Lateral digital extensor muscle

What is 4?

T or F: the medius interosseous muscle is tendinous in equine

True

What is the medius interosseous muscle known as?

interosseous ligament

What is important about the interosseous ligament?

it is apart of the stay apparatus

Proximal

What is 1?

Mid-body

What is 2?

Branches

What is 3?

Extensor branches

What is 4?

What are the types of distal sesamoid ligaments?

-cruciate

-oblique

-straight

What are the types of ungular cartilage ligaments?

-chondrocompedalis

-chondrocornalis

-chondroungularis

T or F: the distal sesamoid ligaments are basically a continuation of the interosseous ligament

True

Cruciate

What is 1?

Oblique

What is 2?

Straight

What is 3?

Chondrocompedalis

What is 1?

Chondrocoronalis

What is 2?

Chondroungularis

What is 3?

What are the sesamoid ligaments of the metacarpophalangeal and distal interphalangeal joints?

-intersesamoidean

-collateral sesamoid ligaments

-short sesamoid ligaments

-impair sesamoid ligament

Intersesamoidean

What is 1?

Collateral sesamoid ligament

What is 2?

Short sesamoid ligament

What is 3?

Collateral sesamoid ligament

What is 4?

Impair sesamoid ligament

What is 5?

Extensor retinaculum

What is 1?

Flexor retinaculum

What is 2?

Carpal tunnel

What is 1?

Proximal digital anular ligament

What is 1?

distal digital anular ligament

What is 2?

palmar anular ligament of fetlock

What is 3?

Since the proximal accessory ligament is absent in the pelvic limb what functions it?

supplied by the insertion of the tendon in the calcanean tuber

T or F: distal accessory ligament in thinner and sometimes absent in the pelvic limb

True

SDF tendon attach to the calcanean tuber and then what?

continues distally with similar insertion in the digit

Where does the DDF tendon slide over?

sustentaculum tali of the calcaneus

Skin

What is 1?

SDF tendon

What is 2?

DDF tendon

What is 3?

distal accessory ligament of the deep digital flexor

What is 4?

Interosseous ligament

What is 5?

Metacarpal bone III

What is 6?