Large Animal Exam 1 Flashcards
4
Dorsal scapular Cartilage
1’
Tuber spinae
Horses only
3
Superglenoid tubercle
2
Acromion
Bovine only
3
intertubercular groove
3’
Intermediate ridge
Equine only
5
Brachialis groove
4
Deltoid tuberosity
1
Greater tubercle
2
Lesser tubercle
Arrows
Interosseous space
What numbers are the split bones in horses?
2 and 4
What is the name of the fracture that is common in the carpal joint?
Chip fractures
What is a slab fracture?
Alignment of the metacarpal tuberosity of the 3rd metacarpal with C3 during overextension can lead to this
What muscles support the shoulder?
Infraspinatus muscle
Subscapularis muscle
Supraspinatus muscle
What are the three joints of the carpus?
Antebrachiocarpal joint
Middle carpal
Carpometacarpal
Does the shoulder have collateral ligaments?
No
Loss of muscle leads to subluxation and luxation
This muscle functions to pull limb forward as a forelimb is in the air
Brachiocephalicus muscle
This muscle functions to pull the trunk forward when a forelimb is contacting the ground?
Power strokes
Latissimus dorsi muscle
Ascending/Caudal deep pectoral muscle
This muscle acts to suspend the thorax from the forelimbs and support the trunk
Elastic properties that allow them to function as shock absorbers
Serratus ventralis muscle
These muscle can aid in adduction of the forelimb
Superficial pectoral mm
This part of the pectoral is specific to the horse and runs along the cranial edge of the scapula and humerus?
Cranial deep pectoral muscle (subclavius)
This muscle acts to raise the scapula
The cervical portion can advance the forelimb
The thoracic portion can assist in swinging the forelimb caudally
Trapezius muscle
This muscle acts to raise and rotate the scapula
Rhomboideus
What muscle flexes the shoulder and what nerve innervates it?
Deltoideus muscle
Axillary nerve
What muscle extends the shoulder and what nerve innervates it?
Biceps brachii muscle
Bicipital tendon
Lacertus fibrosus
Musculocutaneous nerve
What muscle flexes the elbow and what nerve innervates it?
Biceps brachii muscle
Brachialis muscle
Musculocutanous nerve
What muscles extend the elbow and what nerve innervates it?
Tricpes brachii
Tensor fasciae antebrachii
Radial nerve
What are the flexors of the carpus and what nerve innervates it?
Flexor carpi ulnaris muscle
Flexor carpi radialis muscle
Ulnar and median nerve
What are the extensors of the carpus and what innervates it?
Extensor carpi radialis muscle
Ulnaris lateralis
Radial nerve
What contributes to the forelimb stay apparatus?
Biceps brachii muscle
Bicipital tendon
Extensor carpi radialis muscle
Lacertus fibrosus
Metacarpal tuberosity
What is the function of the check ligaments?
Prevent hyperextension of the carpus
What is the proximal check ligament associated with and where does it attach?
Associated with superficial digital flexor muscle
Attaches to the palmar surface of the distal end of the radius
What is the distal check ligament associated with and where does it attach?
Associated with the deep digital flexor muscle
Attaches to the palmar surface of the cannon
What consists of the suspensory apparatus?
Suspensory ligament
Proximal sesamoid bone
Distal sesamoid bone
Distal ends of the superficial and deep digital flexor muscle
Prevents hyperextension of the fetlock joint
What nerve innervates the supraspinatus and infraspinatus muscle?
Suprascapular nerve
If this is compressed with the associated muscles=sweeney
Where can the radial nerve be compressed?
At the caudal end of the brachialis groove of the humerus
Leads to the dropped elbow
This artery is found along the caudal border of the scapula and dives between the teres major and subscapularis muscle
Comes off the axillary artery
Subscapular artery
This artery runs cranially toward the shoulder and is the branch indicating the end of the axillary artery
Cranial circumflex humeral artery
This artery branches off the brachial artery
Travels through the interosseous space to reach the extensors of the carpus and digits
Common interosseous artery
This is the main blood supply to the digits
Medial palmar artery
This superficial vein runs along the dorsal edge of the ascending deep pectoral muscle
Just caudal to the elbow
Superficial thoracic vein
This vein serves as a connection between the brachial and cephalic vv
Found on the medial surface of the elbow
Median cubital vein
This vein is found between the bicpes and triceps brachii mm
Drains into the axillary vein
Brachial vein
What are the different surfaces of the navicular bone?
Proximal surface
Distal surface
Flexor surface
Articular surface
This surface of the navicular bone articulates with P2 proximally while a small portion of the dorsal and distal edges articulates with P3
Articular surface
This ligament firmly attaches to P3 to the navicular so they can move as a unit
Distal sesmoidean impar ligament
1
Proximal surface of navicular bone
2
Articular surface of navicular bone
4
Metacarpals 3+4 (bovine cannon bone)
1
P1
Proximal phalanx
2
P2
Middle phalanx
3
P3
Distal phalanx
Pedal bone
10
Interdigital space
6
Abaxial proximal sesamoid bone
7
Axial proximal sesamoid bone
9
Extensor process of pedal bone
1
Suspensory ligament
2
Deep digital flexor tendon
3
Superficial digital flexor tendon
4
Straight sesmoidean ligament
5
Oblique Sesamoidean Ligament
10
Collateral cartilage of P3
What is a screwdriver fracture?
Sagittal ridge of Mc3 and causes a fracture in the sagittal groove of P1
Where does the superficial sesmoidean ligament and superficial digital flexor attach?
P2
Where does the long /common digital extensor tendon insert?
Extensor process of P3
What is the name of the small notch on the midline of P3?
Crena marginalis
Where does the deep digital flexor tendon insert?
On the solar surface of P3
E
Extensor process
S
Sidebone
Arrow
Crena marginalis
The fetlock joint is created by the interlocking of what structures?
Interlocking of the sagittal ridge of the cannon bone and the sagittal groove of P1 and the proximal sesamoids
red line
Fetlock joint
yellow line
PIP joint
blue line
DIP joint
9
Superficial distal sesamoidean ligament
6
Digital cushion
5
Navicular bone
7
Superficial digital flexor tendon
8
Deep digital flexor tendon
10
Navicular bursa
12
Horny (insensitive) laminae
13
Distal sesmoidean impar ligament
What are the extensors of the digits and what innervates them?
Common digital extensor
Lateral digital extensor
radial nerve
What are the flexors of the digits and what innervates them?
Superficial digital flexor
Deep digital flexor mm
Median, ulnar nerve
What is the junction of the hoof and the skin?
Coronet
This is located in the transition zone
This produces a thin waxy layer which protects the hoof wall against drying
Periople
What are the three divisions of the hoof?
Toe
Quarter
Heel
The semi-flat area on the ground surface of the hoof between the wall and the bars
Sole
Triangular shaped region on the ground surface of the hoof where the point is called the apex
There is a single central sulcus that is rather shallow
Frog
This separates the sole and bar from the frog on the ground surface
Collateral sulci
1
Apex of the frog