Flashcards

Trunk Muscles

Sabrina Swafford Biology English 28 cards

Cards in this deck (28)

1—Deltoid
Origin: Lateral clavicle, Spine & acromion process of Scapula
Insertion: Deltoid tuberosity of Humerus
Actions: Abduct, flexes and medially rotates arm at shouldar
2—Deltoid
Origin: Lateral clavicle, Spine & acromion process of Scapula
Insertion: Deltoid tuberosity of Humerus
Actions: Abduct, flexes and medially rotates arm at shouldar
3—Deltoids
Origin: Lateral clavicle, Spine & acromion process of Scapula
Insertion: Deltoid tuberosity of Humerus
Actions: Abduct, flexes and medially rotates arm at shouldar
4—Deltoid
Origin: Lateral clavicle, Spine & acromion process of Scapula
Insertion: Deltoid tuberosity of Humerus
Actions: Abduct, flexes and medially rotates arm at shouldar
5—Pectoralis Major
Origin: Clavicle, sternum, and ribs (1-6)
Insertion: Interubercular sulcus and greater of Humerus
Actions: Adducts, flexes and medially arm at shoulder joint
6—Pectoralis Major
Origin: Clavicle, sternum, and ribs (1-6)
Insertion: Interubercular sulcus and greater of Humerus
Actions: Adducts, flexes and medially arm at shoulder joint
7—Pectoralis Minor
Origin: Ribs (3-5)
Insertion: Coracoid process on Scapula
Action: Pulls scapula downward and forward (abduct)
8—Pectoralis Minor
Origin: Ribs (3-5)
Insertion: Coracoid process on Scapula
Action: Pulls scapula downward and forward (abduct)
9—Pectoralis Minor
Origin: Ribs (3-5)
Insertion: Coracoid process on Scapula
Action: Pulls scapula downward and forward (abduct)
10—Serratus Anterior
Origin: Ribs (upper 8)
Insertion: Anterior vertebral border of Scapula
Action: Pulls scapula against the chest wall
11—Serratus Anterior
Origin: Ribs (upper 8)
Insertion: Anterior vertebral border of Scapula
Action: Pulls scapula against the chest wall
12—External Intercostals
Origin: Inferior border of rib above
Insertion: Superior border of rib below
Actions: -Pull ribs towards one another to elevate rib cage
-Aid in inspiration (synergist to diaphragm)
13—Internal intercostals
Origin: Superior border of rib below
Insertion: Inferior border of rib above
Actions: -Draws ribs together to depress rib cage
-Aid in expiration (antagonist to diaphragm)
14—External Oblique
Origin: Ribs (lower 8)
Insertion: iliac crest of Ilium, Linea alba
Actions: -Flexes vertebrae and compresses abdomen
-Rotates and flexes trunk laterally
15—Internal Oblique
Origin: iliac crest of Ilium
Insertions: -Pubis and lower ribs
-Linea alba
Action: -Flexes vertebrae and compresses abdomen
-Rotates and flexes trunk laterally
16—Internal Oblique
Origin: iliac crest of Ilium
Insertions: -Pubis and lower ribs
-Linea alba
Action: -Flexes vertebrae and compresses abdomen
-Rotates and flexes trunk laterally
17—Rectus Abdominus
Origin: crest & symphysis of Pubic bone
Insertion: - xiphoid process of Sternum
-Ribs (costal cartilages of ribs 5-7)
Action: -Stabilizes pelvis
- Flexes & rotates lumbar vertebrae
18—Rectus Abdominus
Origin: crest & symphysis of Pubic bone
Insertion: - xiphoid process of Sternum
-Ribs (costal cartilages of ribs 5-7)
Action: -Stabilizes pelvis
- Flexes & rotates lumbar vertebrae
19—Trapezius
Origin: -Occipital bone
-Thoracic vertebrae
Insertion: -Clavicle
- spine and acromion process of Scapula
Actions: -Elevates and adducts scapula
-Extends neck
20—Trapezius
Origin: -Occipital bone
-Thoracic vertebrae
Insertion: -Clavicle
- spine and acromion process of Scapula
Actions: -Elevates and adducts scapula
-Extends neck
21—Teres Major
Origin: inferior angle of Scapula
Insertion: lesser tubercle of Humerus
Action: Adducts, extends, and medially rotates arm at shoulder joint (synergist to latissimus dorsi)
22—Teres Minor
Origin: Lateral border of Scapula
Insertion: Greater tubercle of Humerus
Action: -Holds head stable in glenoid cavity
- Rotates arm laterally
23—Supraspinatus
Origin: Supraspinous fossa of scapula
Insertion: Greater tubercle of Humerus
Actions: - Holds head of humerus stable in glenoid cavity
-Abducts arm (30 degrees)
24—Infraspinatus
Origin: infraspinous fossa of Scapula
Insertion: Greater tubercle of Humerus
Action: Holds head of humerus stable in glenoid cavity
-Rotates arm laterally
25—Rhomboid Major
Origin: Vertebrae (C7–T5)
Insertion: medial border of Scapula
Actions: Stabilizes and adducts scapula
26—Rhomboid Minor
Origin: Vertebrae (C7–T5)
Insertion: medial border of Scapula
Actions: Stabilizes and adducts scapula
27—Levator Scapulae
Origin: upper cervical of Vertebrae
Insertion: Superior scapula
Actions: Elevates and adducts scapula
28—Latissimus Dorsi
Origin: lumbodorsal fascia of Vertebrae
-Iliac crest & ribs (lower 4)
Insertion: Humerus(intertubercular sulcus)
Action: Adducts, extends, medially rotates arm at shouldar joint.