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occipital bone, ligamentum nuchae & spinous processes of ..., Study notes of Anatomy

Trapezius. Origin: occipital bone, ligamentum nuchae. & spinous processes of thoracic vertebrae. Insertion: clavicle and scapula (acromion.

Typology: Study notes

2021/2022

Uploaded on 09/27/2022

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Trapezius
Origin: occipital bone, ligamentum nuchae
& spinous processes of thoracic vertebrae
Insertion: clavicle and scapula (acromion
and scapular spine)
Action: elevate, retract, depress, or rotate
scapula upward and/or elevate clavicle;
extend neck
Rhomboideus
Minor
Origin: spinous process of vertebrae C7-T1
Insertion: vertebral border of scapula
Action: adducts & performs downward
rotation of scapula
Rhomboideus
Major
Origin: spinous process of superior thoracic
vertebrae
Insertion: vertebral border of scapula from
spine to inferior angle
Action: adducts and downward rotation of
scapula
Levator Scapulae
Origin: transverse precesses of C1-C4
vertebrae
Insertion: vertebral border of scapula near
superior angle
Action: elevates scapula
Serratus Anterior
Origin: anterior and superior margins of
ribs 1-8 or 1-9
Insertion: anterior surface of vertebral
border of scapula
Action: protracts shoulder: rotates scapula
so glenoid cavity moves upward rotation
pf3
pf4
pf5

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Trapezius

Origin: occipital bone, ligamentum nuchae & spinous processes of thoracic vertebrae

Insertion: clavicle and scapula (acromion and scapular spine)

Action: elevate, retract, depress, or rotate scapula upward and/or elevate clavicle; extend neck

Rhomboideus Minor

Origin: spinous process of vertebrae C7-T

Insertion: vertebral border of scapula

Action: adducts & performs downward rotation of scapula

Rhomboideus Major

Origin: spinous process of superior thoracic vertebrae

Insertion: vertebral border of scapula from spine to inferior angle

Action: adducts and downward rotation of scapula

Levator Scapulae

Origin: transverse precesses of C1-C vertebrae

Insertion: vertebral border of scapula near superior angle

Action: elevates scapula

Serratus Anterior

Origin: anterior and superior margins of ribs 1-8 or 1- Insertion: anterior surface of vertebral border of scapula

Action: protracts shoulder: rotates scapula so glenoid cavity moves upward rotation

Pectoralis Minor

Origin: anterior surfaces and superior margins of ribs 3-

Insertion: coracoid process of scapula

Action: depresses & protracts shoulder, rotates scapula (glenoid cavity rotates downward), elevates ribs

Supraspinatus

Origin: supraspinous fossa of scapula

Insertion: greater tuberacle of humerus

Action: abduction at the shoulder

Infraspinatus

Origin: infraspinous fossa of scapula

Insertion: greater tubercle of humerus

Action: lateral rotation at shoulder

Deltoid

Origin: clavicle and scapula (acromion and adjacent scapular spine)

Insertion: deltoid tuberosity of humerus

Action: abducts shoulder, flexion and extension, medial and lateral rotation of humerus

Teres Minor

Origin: lateral border of scapula

Insertion: greater tubercle of humerus

Action: lateral rotation at shoulder

Triceps Brachii (lateral head, long head, medial head)

Origin: (Lateral) Superior, lateral margin of humerus:(Long) Infraglenoid tubercle of scapula;(Medial) Posterior surface of humerus, inferior to radial groove

Insertion: Olecranon of ulna

Action: (Lateral) extension at elbow;(Long) extension at elbow, extension & aduction at shoulder;(Medial) extension at elbow

Brachialis

Origin: anterior, distal surface of humerus

Insertion: ulnar tuberosity

Action: flexion at elbow

Brachioradialis

Origin: ridge superior to lateral epicondyle of humerus

Insertion: lateral aspect of styloid process of radius

Action: flexion at elbow

Pronator Teres

Origin: medial epicondyle of humerus & coronoid process of ulna

Insertion: middle of lateral surface of radius

Action: pronates forearm and hand by medial rotation of radius at radioulnar joints & flexion at elbow

Flexor Carpi Radialis

Origin: medial epicondyle of humerus

Insertion: bases of 2nd and 3rd metacarpal bones

Action: flexion and abduction at wrist

Flexor Carpi Ulnaris

Origin: medial epicondyle of humerus; adjacent medial surface of olecranon and anteromedial surface of ulna

Insertion: pisiform bone, hamate bone, and base of 5th metacarpal bone

Action: flexion and adduction at wrist

Extensor Carpi Ulnaris

Origin: lateral epicondyle of humerus; adjacent dorsal surface of ulna

Insertion: base of 5th metacarpal bone

Action: extension and adduction at wrist

Extensor Carpi Radialis Brevis

Origin: lateral epicondyle of humerus

Insertion: base of 3rd metacarpal bone

Action: extension and abduction at wrist

Extensor Carpi Radialis Longus

Origin: lateral supracondylar ridge of humerus

Insertion: base of 2nd metacarpal bone

Action: extension an abduction at wrist

Supinator

Origin: lateral epicondyle of humerus and ridge near radial notch of ulna

Insertion: anterolateral surface of radius distal to the radial tuberosity

Action: supinates forearm and hand by lateral rotation of radius at radioulnar joints