Muscles Of The Back & Pectoral Girdle Flashcards
1
Q
Latissimus Dorsi
A
- Origin: T7-T12, iliac crest
- Insertion: proximal humerus
- Action: adduction and extension of humerus
2
Q
Erector spinae group
A
- Origin: T9-T12, iliac crest
- Insertion: C2-T2
- Action: extension and lateral flexion of spine
3
Q
Levator Scapulae
A
- Origin: C1-C4
- Insertion: scapula
- Action: pulls scapula forward
4
Q
Rhomboideus (Major & Minor)
A
- Origin: C7-T5
- Insertion: scapula
- Action: adduct and medial rotation of scapula
5
Q
Serratus Anterior
A
- Origin: ribs 1-8
- Insertion: scapula
- Action: pulls scapula forward
6
Q
Pectoralis Major
A
- Origin: clavicle, sternum, ribs 3-5
- Insertion: proximal humerus
- Action: Adduction and flexion of arm
7
Q
Pectoralis Minor
A
- Origin: ribs 3-5
- Insertion: coracoid process
- Action: stabilize scapula inferiorly
8
Q
Coracobrachialis
A
- Origin: coracoid process
- Insertion: medial humerus
- Action: adduction and flexion of arm
9
Q
Deltoid
A
- Origin: acromion and scapular spine
- Insertion: deltoid tuberosity
- Action: abduction and rotation of arm
10
Q
Teres Major
A
- Origin: scapula
- Insertion: proximal humerus
- Action: adduction, internal rotation of arm
11
Q
Supraspinatus
A
- Origin: supraspinous fossa
- Insertion: greater tubercle
- Action: abduction of humerus
12
Q
Infraspinatus
A
- Origin: infraspinous fossa
- Insertion: greater tubercle
- Action: external rotation of humerus
13
Q
Teres Minor
A
- Origin: lateral scapula
- Insertion: greater tubercle
- Action: external rotation of humerus
14
Q
Subscapularis
A
- Origin: subscapular fossa
- Insertion: lesser tubercle
- Action: internal rotation of humerus
