210 Lab Exam 2

These flashcards cover key muscle names, their origins, insertions, and actions based on the anatomy lecture notes.

Sartorius - Origin

Ilium

Sartorius - Insertion

tibia

Sartorius - Action

Flexes knee; flexes thigh and rotates it laterally.

Gracilis - Origin

Pubis

Gracilis - Insertion

tibia

Gracilis - Action

Flexes knee; adducts thigh.

Rectus femoris - Origin

Ilium

Rectus femoris - Insertion

Patella and tibia

Rectus femoris - Action

Extends knee; flexes thigh.

Vastus medialis - Origin

Femur

Vastus medialis - Insertion

Patella and tibia

Vastus medialis - Action

Extends knee.

Vastus lateralis - Origin

Femur

Vastus lateralis - Insertion

Patella and tibia

Vastus lateralis - Action

Extends knee.

Adductor longus - Origin

Pubis

Adductor longus - Insertion

Femur

Adductor longus - Action

Adducts, rotates, and flexes femur.

Adductor femoris (magnus) - Origin

Pubis and Ischium

Adductor femoris (magnus) - Insertion

Femur

Adductor femoris (magnus) - Action

Adducts, rotates, and flexes femur.

Semimembranosus - Origin

Ischium

Semimembranosus - Insertion

Tibia

Semimembranosus - Action

Flexes knee; extends thigh.

Iliacus - Origin

Iliac

Iliacus - Insertion

Tendon of psoas major

Iliacus - Action

Flexes and rotates femur laterally; flexes vertebral column.

Psoas major - Origin

Lumbar vertebrae

Psoas major - Insertion

Femur

Psoas major - Action

Flexes and rotates femur laterally; flexes vertebral column.

Iliopsoas (cat)

A combination of the iliacus and psoas major muscles, just know for the exam that it is on the cat

Pectineus - Origin

Pubis

Pectineus - Insertion

Femur (proximal end)

Pectineus - Action

Flexes, adducts, and rotates thigh laterally.

Gluteus maximus - Origin

Ilium, sacrum, and coccyx

Gluteus maximus - Insertion

femur

Gluteus maximus - Action

Extends and rotates femur laterally.

Gluteus medius - Origin

Ilium

Gluteus medius - Insertion

femur

Gluteus medius - Action

Abducts and rotates femur laterally.

Tensor fascia latae - Origin

Ilium

Tensor fascia latae - Insertion

Tibia

Tensor fascia latae - Action

Flexes and abducts femur.

Biceps femoris - Origin

Ischium and femur

Biceps femoris - Insertion

Fibula and tibia

Biceps femoris - Action

Flexes knee; extends thigh.

Semitendinosus - Origin

Ischium

Semitendinosus - Insertion

tibia

Semitendinosus - Action

Flexes knee; extends thigh.

Serratus ventralis - Origin

First {8-9} ribs

Serratus ventralis - Insertion

Scapula

Serratus ventralis - Action

Pulls scapula forward and rotates it upward.

Scalenus anterior - Origin

Cervical vertebrae

Scalenus anterior - Insertion

Rib 2

Scalenus anterior - Action

Elevates rib during deep inhalation, laterally flexes vertebral column

Scalenus medius - Origin

Cervical vertebrae

Scalenus medius - Insertion

Rib 1

Scalenus medius - Action

Elevates rib during deep inhalation, laterally flexes vertebral column

Scalenus posterior - Origin

Cervical vertebrae

Scalenus posterior - Insertion

Rib 2

Scalenus posterior - Action

Elevates rib during deep inhalation, laterally flexes vertebral column

Triceps brachii (Long head) - Origin

Scapula

Triceps brachii (Long head) - Insertion

ulna

Triceps brachii (Long head) - Action

Extends forearm.

Triceps brachii (Lateral head) - Origin

Humerus

Triceps brachii (Lateral head) - Insertion

ulna

Triceps brachii (Lateral head) - Action

Extends forearm.

Triceps brachii (Medial head) - Origin

Humerus

Triceps brachii (Medial head) - Insertion

ulna

Triceps brachii (Medial head) - Action

Extends forearm.

Brachialis - Origin

Humerus

Brachialis - Insertion

Ulna

Brachialis - Action

Flexes forearm.

Brachioradialis - Origin

Humerus

Brachioradialis - Insertion

radius

Brachioradialis - Action

Flexes forearm.

Flexor carpi radialis - Origin

Humerus

Flexor carpi radialis - Insertion

2nd and 3rd metacarpals

Flexor carpi radialis - Action

Flexes and abducts wrist.

Gastrocnemius - Origin

Femur

Gastrocnemius - Insertion

Calcaneus

Gastrocnemius - Action

Plantar flexes (extends) foot.

Tibialis anterior - Origin

Tibia

Tibialis anterior - Insertion

1^{st} metatarsal and medial cuneiform

Tibialis anterior - Action

Flexes foot dorsally (dorsiflexes) and inverts it.

Subscapularis- origin

scapula

Subscapularis- insertion

Humerus

Subscapularis- Action

Medially rotates the humerus, stabilizes shoulder

External Intercostal- Origin

Inferior border of the rib

External intercostal- insertion

Superior border of rib below

External intercostal- action

Raise rib at inhalation and thereby increase size of thoracic cavity

Internal intercostal- origin

Superior border of rib below

Internal Intercostal- Insertion

Inferior border of rib above

Internal intercostal- action

Draw adjacent ribs together and lower ribs at exhalation

Extensor Capri Rradialis- Origin

Humerus

Extensor Capri Radialis- Insertion

Second Metacarpal

Extensor digitorum Communis- Origin

Humerus

Extensor digitorum Communis- Insertion

Four digits (fingers)

Extensor Capri Radialis- Action

Extends hands

Extensor digitorum communis- action

Extends digits