✅️⭐️5 - Thoracic Limb Muscles & Joints 1

intrinsic

intrinsic

extrinsic

The ______ muscles join the forelimb to the trunk and consist of superficial and deep layers

2 multiple choice options

synsarcosis

The type of attachment of the thoracic limb to the trunk and neck is called _____ - arrangement of muscles without forming a conventional articulation between the scapula-humerus and the body

ball-and-socket/ spheroidal joint

The shoulder consists of what type of joint?

reviewed

review

humeral

The lateral muscles of the shoulder act on what joint?

scapular and acromial

What are the 2 parts of the deltoideus muscle?

scapular part of deltoideus m.

What is A?

2 multiple choice options

acromial part of deltoideus m.

What is B?

2 multiple choice options

spine of scapula and acromion

Origin of deltoideus muscle:

deltoid tuberosity of humerus

Insertion of deltoideus muscle:

flex humeral joint

Action of deltoideus muscle:

deltoideus

The following are associated with what muscle?

Origin: spine of scapula and acromion

Insertion: deltoid tuberosity of humerus

Action: flex the humeral joint

deltoideus

What muscle is shown?

suprascapular & axillary

What nerves are associated with the lateral muscles of the shoulder?

supraspinatus

What muscle is shown?

supraspinous fossa of the scapula

Origin of supraspinatus muscle:

greater tubercle of humerus

Insertion of supraspinatus muscle:

laterally stabilize humeral joint & extend the humeral joint

Action of supraspinatus muscle:

supraspinatus

The following are associated with what muscle?

Origin: supraspinous fossa of the scapula

Insertion: greater tubercle of the humerus

Action: laterally stabilize the humeral joint; extend the humeral joint

infraspinatus

What muscle is shown?

infraspinous fossa of scapula

Origin of infraspinatus muscle:

greater tubercle of humerus

Insertion of infraspinatus muscle:

laterally stabilize humeral joint

Action of infraspinatus muscle:

infraspinatus

The following are associated with what muscle?

Origin: infraspinous fossa of the scapula

Insertion: greater tubercle of the humerus

Action: laterally stabilize the humeral joint

spheroidal

The humeral joint is a _____ joint

teres minor

What muscle is shown?

caudal border of scapula

Origin of teres minor:

teres minor tuberosity of humerus

Insertion of teres minor:

flex humeral joint

Action of teres minor:

teres minor

The following are associated with what muscle?

Origin: caudal border of scapula

Insertion: teres minor tuberosity of the humerus

Action: flex the humeral joint

subscapularis

What muscle is shown?

subscapular fossa of scapula

Origin of subscapularis:

lesser tubercle of humerus

Insertion of subscapularis:

medially stabilize humeral joint

Action of subscapularis:

subscapularis

The following are associated with what muscle?

Origin: subscapular fossa of scapula

Insertion: lesser tubercle of humerus

Action: medially stabilize the humeral joint

teres major

What muscle is shown?

caudal border of scapula

Origin of teres major:

teres major tuberosity of humerus

Insertion of teres major:

flex humeral joint

Action of teres major:

teres major

The following are associated with what muscle?

Origin: caudal border of scapula

Insertion: teres major tuberosity of humerus

Action: flex the humeral joint

coracobrachialis

What muscle is shown?

coracoid process of scapula

Origin of coracobrachialis:

crest of the lesser tubercle of humerus

Insertion of coracobrachialis:

medially stabilize humeral joint

Action of coracobrachialis:

coracobrachialis

The following are associated with what muscle?

Origin: coracoid process of scapula

Insertion: crest of the lesser tubercle of the humerus

Action: medially stabilize the humeral joint

hinge

The humeroulnar joint is a _____ joint

pivot

The proximal radioulnar joint is a _____ joint

ellipsoidal

The humeroradial joint is a _____ joint

reviewed

review

lateral collateral

What is the name of this ligament?

medial collateral

What is the name of this ligament?

cubital & humeral

The cranial muscles of the brachium act on what 2 joints?

musculocutaneous

The cranial muscles of the brachium are associated with what nerve(s)?

biceps brachii

What muscle is shown?

supraglenoid tubercle

Origin of biceps brachii:

radial tuberosity (and ulnar tuberosity in dog)

Insertion of biceps brachii:

flex the cubital joint & extend the humeral joint

Action of biceps brachii:

biceps brachii

The following are associated with what muscle?

Origin: supraglenoid tubercle

Insertion: radial tuberosity (and ulnar tuberosity in dog)

Action: flex the cubital joint; extend the humeral joint

brachialis

What muscle is shown?

brachial groove of humerus

Origin of brachialis:

proximal radius and/or ulna

Insertion of brachialis:

flex cubital joint

Action of brachialis:

brachialis

The following are associated with what muscle?

Origin: brachial groove of humerus

Insertion: proximal radius and/or ulna

Action: flex the cubital join

cubital & humeral

The caudal muscles of the brachium act on what joints?

radial

The caudal muscles of the brachium are associated with what nerve(s)?

triceps brachii

What muscle is shown?

caudal border of scapula (long head)

proximal humerus (other heads)

Origin of triceps brachii:

tuber olecrani

Insertion of triceps brachii:

extend cubital joint (all heads)

flex humeral joint (long head only)

Action of triceps brachii:

accessory, lateral, medial, and long heads

What are the 4 parts of the triceps brachii?

triceps brachii

The following are associated with what muscle?

Origin: caudal border of scapula (long head); proximal humerus (other heads)

Insertion: tuber olecrani

Action: extend the cubital joint (all heads); flex the humeral joint (long head only)

accessory head

What is A?

lateral head

What is B?

long head

What is C?

medial head

What is the yellow arrow pointing to?

tensor fasciae antebrachii

What muscle is shown?

latissimus dorsi & associated fascia

Origin of tensor fasciae antebrachii:

tuber olecrani

Insertion of tensor fasciae antebrachii:

extend cubital joint & tense deep antebrachial fascia

Action of tensor fasciae antebrachii

tensor fasciae antebrachii

The following are associated with what muscle?

Origin: latissimus dorsi and associated fascia

Insertion: tuber olecrani

Action: extend the cubital joint (and tense the deep antebrachial fascia)

anconeus

What muscle is shown?

caudal aspect of distal humerus

Origin of anconeus:

tuber olecrani

Insertion of anconeus:

extend cubital joint

Action of anconeus:

anconeus

The following are associated with what muscle?

Origin: caudal aspect of distal humerus

Insertion: tuber olecrani

Action: extend the cubital join

extensor

The following muscles are part of the [extensor/flexor] group:

-extensor carpi radialis m.

-extensor carpi ulnaris m. (ulnaris lateralis)

-abductor digit I longus m.

-common digital extensor m.

-lateral digital extensor

2 multiple choice options

flexor

The following muscles are part of the [extensor/flexor] group:

-flexor carpi radialis m

-superficial digital flexor m

-flexor carpi ulnaris m

-deep digital flexor m

2 multiple choice options

extensor carpi radialis

What muscle is shown?

lateral epicondyle of the humerus (and its crest)

Origin of extensor carpi radialis:

dorsal base of 2nd and 3rd metacarpal bone

Insertion of extensor carpi radialis:

extend carpal joints

Action of extensor carpi radialis:

extensor carpi radialis

The following are associated with what muscle?

Origin: lateral epicondyle of the humerus (and its crest)

Insertion: dorsal base of 2nd and 3rd metacarpal bones

Action: extend the carpal joints

common digital extensor

What muscle is shown?

lateral epicondyle of humerus

Origin of common digital extensor:

extend carpal and digital joints

Action of common digital extensor:

common digital extensor

The following are associated with what muscle?

Origin: lateral epicondyle of the humerus

Insertion: extensor processes of distal phalanges

Action: extend the carpal joints; extend the digital joints

extensor processes of distal phalanges

Insertion of common digital extensor:

lateral digital extensor

What muscle is shown?

lateral epicondyle of humerus

Origin of lateral digital extensor: