Muscles Week 2 - Biology 264 with Gardner at Brigham Young University-Idaho

Anat P.

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Biceps Brachii

Origin: Coracoid process; scapula

Insertion: Raial tuberosity of radius

Action: Flexes and supinates forearm

image linea_alba-thumb for term side of card

Rectus Abdominus

Origin: Pubic Crest, symphysis pubis

Insertion: Costal cartilage of ribs

Action: Flexes vertebral column, compresses abdomen

Triceps Brachii

Origin: Scapula; posterior and lateral humerus

Insertion: Olecranon process of ulna

Action: Extends forearm

image exten_carp_rad-thumb for term side of card

Extensor Carpi Radialis Brevis

Origin: Lateral epicondyle of humerus

Insertion: 5th metacarpal

Action: Extends and abducts wrists

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Longissimus

Origin: Transverse processes of thoracic vertebrae

Insertion: Transverse process of all thoracic vertebrae

Action: Extends Spine

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Pronator Teres

Origin: Medial epicondyle of humerus

Insertion: Radius

Action: Pronates forearm

Linea Alba

*Thick tendon running down the middle of the abdomen

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External Abdominal Oblique

Origin: Lower eight ribs

Insertion: Iliac crest, Linea Alba, inguinal ligament

Action: Compresses Abdomen, lateral rotation of trunk

Spinalis

Origin: Spinous process of upper lumbar and lower thoracic vertebrae

Insertion: Spinous processes of middle and upper thoracic vertebrae

Action: Extends Spine

image flexcarpi-thumb for term side of card

Origin: Medial epicondyle of humerus

Insertion: Carpals and metacarpals

Action: Flexes and adducts wrist

Name the Origin, Insertion and Action for Flexor Digitorum Profundus

Origin: Ulna

Insertion: Distal phalanges of digits 2-5

Action: Flexes digits

Iliocostalis

Origin: Sacrum, crest of ilium, and ribs

Insertion: Ribs and vertebrae

Action: Extends Spine

Gluteus Maximus

Origin: Iliac Crest, sacrum, occyx

Insertion: Gluteal tuberosity of femur

Action: Extends hip and rotates thigh laterally

Brachialis

Origin: Anterior surface of humerus

Insertion: Coronoid process of ulna

Action: Flexes forearm

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Brachioradialis

Origin: Lateral supracondylar ridge of humerus

Insertion: Styloid process of radius

Action: Flexes forearm

The Iliocostalis, Longissimus, Spinalis make up what?

Sacrospinalis (erector spinae)

Origin: Medial epicondyle of humerus

Insertion: Base of 2nd and 3rd metacarpals

Action: Flexes and abducts hand

image arm_post-thumb for term side of card

Extensor Pollicis Longus

Origin: Shaft of Radius

Insertion: Distal phalanx of thumb

Action: Extends thumb

Tensor Fascia Latae

Origin: Anterior superior iliac spine

Insertion: Iliotibial tract to lateral condyle of tibia

Action: Abducts thigh

Piriformis

Origin: Sacrum and ilium

Insertion: Greater trochanter of femur

Action: Laterally rotates extended thigh, abducts flexed thigh

What are the two muslces in the hip that join together to create the Iliopsoas

Iliacus-Origin: Iliac fossa of ilium

Psoas Major: Vertebrae

Both

Insertion: Lesser trochanter of femur

Action: Flexes thigh, rotates thigh laterally, flexes vertebral column

Origin: Medial epicondyle of humerus

Insertion: Palmar Fascia

Action: Flexes wrist

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