Term
| Atlantoscapularis Posterior |
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Definition
Origin: transverse processes of cervical vertebrae 1 -4
Insertion: upper angle of scapula
Action: Draws scapula cranially, rotates glenoid fossa upward |
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Term
| Atlantoscapularis Anterior (omotransversairus in canus lupus) |
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Definition
Origin: Transverse process of Atlas
Insertion: lateral part of spine of scapula and on the acromion
Action: Draws scapula cranially, rotation of glenoid fossa upwards |
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Term
Deltoideus
a) cleidodeltoideus
b) acromindeltoideus
c) spinodeltoideus |
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Definition
Origin: a) clavicle
b) acromion
c) spine of scapula
Insertion: deltoid tuberosity of the humerus
Action: Abductor as a whole
a) flexion
b) abduction
c) extension |
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Term
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Definition
Origin: Supraspinous fossa of the scapula
Insertion: Greater tuberosity of the humerus
Action: initiation of abduction, bracing head of humerus to glenoid fossa |
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Term
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Definition
Origin: Infraspinous fossa of scapula
Insertion: greater tuberosity of humerus
Action: Bracing head of humerus to glenoid fossa (acts as a collateral "ligament"), lateral rotation of the arm |
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Term
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Definition
Origin: Supscapular fossa of scapula
Insertion: lesser tuberosity of the humerus
Action: bracing head of humerus to glenoid fossa (acts as a collateral "ligament"), medial rotation of the arm |
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Term
Biceps Brachii
a) long head
b) short head (absent in canin lupus familiaris) |
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Definition
origin: a) supraglenoid tuberosity scapula
b) coracoid of scapula
Insertion: bicipital tuberosity of the radius, bicipital aponeurosis
Action: flexes elbow, supinates forarm, stabilizes shoulder joint (ie put in corkscrew, pull out cork) |
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Term
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Definition
Origin: distal shaft of the humerus (deep to biceps brachii)
Instertion: coronoid process of the ulna
Action: flexes elbow |
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Term
Triceps Brachii
a) long head
b) medial head
c) lateral head |
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Definition
Origin: a) inferior border of the scapula, (infraglenoid tuberosity)
b),c) shaft of the humerus
Insertion: olecranon (ulna)
Action: extends elbow |
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Term
| Tensor Fascia Antebrachii |
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Definition
Origin: tendon of the latissimus dorsi
Insertion: olecranon (ulna) and deep fascia of forearm
Action: extends elbow |
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Term
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Definition
Origin: sternum, sternoclavicular joint
Insertion: Lateral lip of the bicipital (intertubercular) groove of humerus
Action: clavicular portion draws arm forward in flexion, sternal for adduction, medial rotation of humerus, accessory for respiration |
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Term
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Definition
Origin: lateral border of the sternum at the cartilage of the 3 -5 rib
Insterion: coracoid of scapula
Action: protraction of shoulder (forward and down) |
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Term
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Definition
Origin: xyphoid process, aponeurosis from rectus abdominis
Insertion: by aponeurosis to coracoid of scapula
Action: adduction of arm, medial rotation of humerus |
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Term
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Definition
Origin: superficial and deep fascia of the trunk
Insertion: humerus, aponeurosis to coracoid (distal to pectorialis abdominalis)
Action: skin twitch, adduction maybe |
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Term
| Serratus Ventralis (Serratus Anterior) |
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Definition
Origin: digitations of the first 8 or 9 ribs, digitations from cervical vertebrae 4,5,6 transverse processes
Insertion: medial border of the costal surface of the scapula
Action: cranial/caudal movement of scapula, scapula protraction, stabalizes scapula in conjuction with trapezius (shrugging) |
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Term
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Definition
Origin: Occipital bone, nuchal ligament, spines of thoracic vertebrae
Insertion: clavicle, spine and acromion of scapula
Action: rotation of scapula so glenoid fossa faces upwards, scapula retraction |
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Term
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Definition
Origin: thoracic vertebrae 1-6, lumbodorsal fascia to iliac crest
Insertion: (spirals around Teres Major) floor of bicipital groove of humerus
Action: extend shoulder joint, medial rotation of humerus, synergistic with Pectorialis Major for powerful adduction |
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Term
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Definition
Origin: inferior angle of the scapula
Instertion: medial lip of the bicipital groove of the humerus
Action: adduction, medial rotation, stabalizes head of humerus during adduction |
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Term
Rhomboideus
a) pars capitis
b) pars cervicis
c) pars thoracis |
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Definition
Origin: a) nuchal crest
b) nuchal ligament
c) spines of thoracic vertebrae 1 -6
Insertion: medial border of the scapula
Action: draws scapula medially and cranially, rotation of glenoid fossa downwards |
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