Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
Deltoideus m.
|
Two heads -
Pars scapularis Pars acromialis |
|
|
Deltoideus - pars scapularis m.
|
Origin - spine of scapula by an aponeurosis
Insertion - deltoid tuberosity of humerus Innervation - axillary n. Main action - flex shoulder joint |
|
|
Deltoideus - pars acromialis m.
|
Origin - acromion of scapula
Insertion - deltoid tuberosity of humerus Innervation - axillary n. Main action - flex shoulder joint |
|
|
Infraspinatus m.
|
Origin - infraspinous fossa of scapula
Insertion - lateral side of greater tubercle of humerus Innervation - suprascapular n. Main actions - extend or flex, **laterally stabilize**, and abduct shoulder joint |
|
|
Subtendinous synovial bursa
|
The subtendinous synovial bursa is located deep to the tendon of insertion of the infraspinatus m. where it courses over the caudal part of the greater tubercle of the humerus before inserting distal to the tubercle.
|
|
|
Teres minor m.
|
Origin - infraglenoid tubercle and distal 1/3 of caudal border of scapula
Insertion - teres minor tuberosity of humerus Innervation - axillary n. Main actions - flex shoulder joint, rotate shoulder laterally, prevent medial rotation when bearing weight |
|
|
Supraspinatus m.
|
The m. supraspinatus is a thick muscle that fills the supraspinous fossa and covers the cranial margin of the scapula.
Origin - supraspinous fossa of scapula Insertion - greater tubercle of humerus Innervation - suprascapular n. Main actions - extend and laterally stabilize shoulder joint |
|
|
Subscapularis m.
|
Origin - subscapular fossa of humerus
Insertion - lesser tubercle of humerus Innervations - subscapular n., **axillary n. (small area, caudal portion of the muscle)** Main actions - adduct, extend, and **medially stabilize shoulder joint**; rotate the shoulder medially and prevent lateral rotation when bearing weight |
|
|
Teres major m.
|
Origin - caudal angle and caudal border of scapula, caudal surface of subscapularis m.
Insertion - teres major tuberosity of humerus Innervation - axillary n. Main actions - flex shoulder joint, rotate shoulder medially |
|
|
Coracobrachialis m.
|
Origin - coracoid process of scapula
Insertion - crest of lesser tubercle of humerus, proximal to teres major tuberosity Innervation - musculocutanous n. Main actions - adduct, extend, and stabilize shoulder joint |
|
|
Tensor fasciae antebrachii m.
|
In the cat, the tensor fasciae antebrachii m. is wider, covers more of the medial surface of triceps brachii m., and is called epitroclearis m.
Origin - fascia covering lateral sides of latissimus dorsi m. Insertion - olecranon Innervation - radial n. Main action - extend elbow |
|
|
Triceps brachii mm.
|
In the dog and cat, the m. triceps brachii has four heads.These insert in common via a stout tendon on the point of the elbow, formed by the olecranon of the ulna. There is a synovial bursa between the tendon of the long head and the cranial part of the olecranon.
Heads - Long head Medial head Accessory head Lateral head |
|
|
Triceps brachii - caput longum m.
|
Origin - caudal border of scapula
Insertion - olecranon Innervation - radial n. Main action - flex shoulder joint and extend elbow |
|
|
Triceps brachii - caput mediale m.
|
Origin - crest of lesser tubercle of humerus near teres major tuberosity
Insertion - olecranon Innervation - radial n. Main action - extend elbow |
|
|
Triceps brachii - accessory head m.
|
Origin - neck of humerus
Insertion - olecranon Innervation - radial n. Main action - extend elbow |
|
|
Triceps brachii - caput laterale m.
|
Origin - tricipital line of humerus
Insertion - olecranon Innervation - radial n. Main action - extend elbow |
|
|
Anconeus m.
|
Origin - lateral supracondylar crest, medial and lateral humeral epicondyles
Insertion - lateral surface of the proximal end of ulna (olecranon) Innervation - radial n. Main action - extend elbow |
|
|
Epitrochleoanconeus m.
|
Present in the cat, but not in the dog.
Part of anconeus m. Associated with the supracondylar foramen medially. |
|
|
Biceps brachii
|
Origin - supraglenoid tubercle of scapula
Insertion - Dog - radial and ulnar tuberosities Cat - radial tuberosity Innervation - musculocutaneous n. Main actions - extend shoulder joint and flex elbow |
|
|
Transverse humeral retinaculum
|
The transverse humeral retinaculum is a ligament that bridges the intertubecular groove of the humerus, covering the tendon of origin of the m. biceps brachii.
|
|
|
Intertubercular (bicipital) bursa
|
An **extension of the shoulder joint capsule** that wraps around the biceps brachii tendon and acts as a synovial sheath.
Decreases friction on the tendon as it corses through the intertubecular groove. Technically, this is a synovial sheath, but we call it a bursa. |
|
|
Brachialis m.
|
Remember brachiaLis has an 'L' so it is on the lateral side.
Origin - proximal 1/3 of lateral surface of humerus Insertion - Dog - radial and ulnar tuberosities Cat - radial tuberosity Innervation - musculocutaneous n. Main action - flex elbow |
|
|
Brachial mm.
|
Parts -
Biceps brachii Brachialis Coracobrachialis Triceps brachii Anconeus Tensor fasciae antibrachii |
