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48 Cards in this Set

  • Front
  • Back

The clavicular instersection is part of the ___(a)______ (muscle) & separates _____(b)______ & ____(c)______. What's the relationship between (b) & (c) with respect to positioning?

Brachiocephalicus, Cleidocephalicus, Cleidobrachialis. Cleidocephalicus is proximal to cleidobrachialis.

Action of Trapezius m.

To elevate and abduct the limb at the shoulder

Origin of Trapezius m

Median fibrous rapha of neck and supraspinatus ligament

Insertion of Trapezius m

Spine of the scapula

There are two parts of the trapezius. What are they called, where are they in relation to each other and what separates them?

pars cervicalis (cranial) & pars thoracis (caudal). Separated by aponeurosis.

Action of Omotransversarius m.

To advance the limb and flex the neck laterally

Origin of omotransversarius m

The transverse process (wing) of the atlas (C1)

Insertion of omotransversarius m

Distal spine of scapula

"omo" = ?

shoulder

the omotransversarius covers ________.

the superficial cervical lymph node

Name the three heads of triceps brachii m.

caput longum (long head), caput laterale (lateral head), capute mediale (medial head).

Action of caput longum m.

To extend the elbow and flex the shoulder

Origin in caput longum m.

Caudal border of scapula



Insertion of caput longum m.

Olecranon tuber of ulna

Action of caput laterale m.

To extend the elbow

Origin of caput laterale m.

Tricipital line of the humerus

Insertion of caput lateral m.

Olecranon tuber of ulna

Action of caput mediale m.

To extend the elbow

Origin of caput mediale m.

the crest of the lesser tubercle of humerus, near teres major tuberosity

Insertion of caput mediale m.

Olecranon of the ulna

Action of cleidobrachialis m.

Advance the limb. Extend the shoulder. Draw head and neck to the side.

Origin of cleidobrachialis m.

Clavicular Intersection

Insertion of cleidobrachialis m.

Distal end of the cranial aspect of the humerus.

What are the two parts of the cleidocephalicus?

pars cervicalis & pars mastoidea

Action of cleidocephlicus m.

Advance the limb, extend the shoulder, draw head and neck to the side.

Origin of cleidocephalicus

pars cervicalis - clavicular intersetion


pars mastoidea - clavicular insertion

Insertion of cleidocephlicus

pars cervicalis - dorsal midline of the neck


pars mastoidea - mastoid process of temporal bone

Action of Latissimus Dorsi

To draw the limb caudally and flex the shoulder

Origin of Latissimus Dorsi

Thoracolumbar fascia from spinous processes of lumbar vertebrae & last 2-3 ribs

Insertion of Latissimus Dorsi

Teres major tuberosity of humerus via the teres major tendon.




*The tendon of this muscle joins with the teres major tendon*

Action of Serratus Ventralis m.

Support trunk and depress scapula

Origin of Serratus Ventralis m.

Ribs & transverse processes of cervical vertebrae

Insertion of Serratus Ventralis m.

Serrated face of scapula

"Flying scapula" occurs in what species? What is the cause?

Ruminants & horses; myopathy and/or damage to the serratus ventralis result in the dorsal border of the scapula rising above the whithers. Support of the forelimb is lost.

Action of Deltoideus m.

To flex the shoulder joint

Name the two parts of the deltoideus AND species variations.

pars scapularis & pars acromialis.




**species lacking an acromion do not have a divided deltoideus m. (i.e. HORSE)

Origin of deltoideus m.

The spine & acromial process of scapula

Insertion of detoideus m.

Deltoid tuberosity of humerus

Action of the infrapsinatus m.

Laterally stabilize the shoulder. To prevent medial rotation when weight-bearing. Abduct and laterally rotate the shoulder.

Origin of infraspinatus m.

infraspinatus fossa of scapula

Insertion of infraspinatus m.

A small, circumscribed area of the lateral side of the greater tubercle of the humerus

Action of the supraspinatus

To extend and laterally stabilize the shoulder

Origin of the supraspinatus

The supraspinatus fossa of the scapula

Insertion of the supraspinatus

The greater tubercle of the humerus

Action of the subscapularis

To medially stabilize the shoulder, prevents lateral rotation when weight-bearing. Adduct shoulder. Extend shoulder.

Action of sternocephalicus

To draw head and neck to the side

Origin of sternocephalicus

Manubrium

Insertion of sternocephalicus

pars occipitalis - nuchal crest in occipital bone




pars mastoidea - mastoid process of the temporal bone