Practical 3

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: gastrocnemius

Origin: medial and lateral condyles of femur

Insertion: calcaneal tendon

Action: plantar flexion

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: gluteus maximus

Origin: sacrum

Insertion: gluteal tuberosity of femur

Action: hip extension

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: iliacus

Origin: iliac fossa

Insertion: lesser trochanter of femur

Action: flex hip

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: psosas major

Origin: L1-L5

Insertion: lesser trochanter of femur

Action: flex hip

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: rectus femoris

Origin: anterior inferior iliac spine

Insertion: tibial tuberosity

Action: extends leg

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: vastus lateralis

Origin: greater trochanter of femur

Insertion: tibial tuberosity

Action: extends leg

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: vastus medialis

Origin: linea aspera of femur

Insertion: tibial tuberosity

Action: extends leg

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: vastus intermedius

Origin: anterior femur

Insertion: tibial tuberosity

Action: extends leg

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: tibialis anterior

Origin: lateral condyle of tibia

Insertion: 1st metatarsal

Action: ankle dorsiflexion

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: deltoid

Origin: clavicle

Insertion: deltoid tuberosity

Action: abducts shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: biceps brachii

Origin: coracoid process of scapula

Insertion: radial tuberosity of radius

Action: elbow flexion

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: brachioradialis

Origin: lateral end of humerus

Insertion: radius

Action: flexes forearm

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: triceps brachii

Origin: posterior humerus

Insertion: olecranon process of ulna

Action: extends elbow

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: masseter

Origin: zygomatic arch

Insertion: ramus of mandible

Action: closes jaw

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: sternocleidomastoid

Origin: clavicle

Insertion: mastoid process

Action: neck flexion

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: temporalis

Origin: temporal fossa

Insertion: coronoid process of mandible

Action: closes jaw

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: trapezius

Origin: occipital bone

Insertion: spine of scapula

Action: shrugs shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: latissimus dorsi

Origin: iliac crest

Insertion: intertubercular sulcus of humerus

Action: shoulder extension

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: pectoralis major

Origin: sternum

Insertion: intertubercular sulcus of humerus

Action: arm flexion

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: Semitendinosus

Origin: ischial tuberosity of ischium

Insertion: proximal medial tibia

Action: flex knee

What muscle is this (the 3rd line pointing/ muscle most medial)? What is an origin? What is an insertion? What is an action?

Muscle: semimembranosus

Origin: ischial tuberosity of ischium

Insertion: medial condyle of tibia

Action: flex knee

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: biceps femoris

Origin: ischial tuberosity of ischium

Insertion: fibular head

Action: flex knee

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: supraspinatus

Origin: supraspinous fossa

Insertion: greater tubercle of humerus

Action: stabilize shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: infraspinatus

Origin: infraspinous fossa

Insertion: greater tubercle of humerus

Action: stabilize shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: teres minor

Origin: lateral border of scapula

Insertion: greater tubercle of humerus

Action: stabilize shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: Subscapularis

Origin: subscapular fossa

Insertion: lesser tubercle of humerus

Action: stabilize shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: teres major

Origin: inferior angle of scapula

Insertion: intertubercular groove of humerus

Action: extends shoulder

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: pectoralis minor

Origin: anterior surface of ribs 3-5

Insertion: coracoid process

Action: helps with inspiration

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: rectus abdominus

Origin: pubic symphysis

Insertion: xiphoid process

Action: increases abdominal pressure

What muscle is this? What action does this muscle perform?

Buccinator, whistles

What muscle is this? What action does this muscle perform?

Frontal Belly, Raises eyebrows

What muscle is this? What action does this muscle perform?

Occipital Belly, pulls scalp posteriorly

What muscle is this? What action does this muscle perform?

Mentalis, protrudes lip

What muscle is this? What action does this muscle perform?

Orbicularis Oris, lip movement

What muscle is this? What action does this muscle perform?

Orbicularis oculi, closes eyes

What muscle is this? What action does this muscle perform?

Diaphragm, inspiration

What action does the external intercostals perform?

Inspiration

What action does the internal intercostals perform?

Expiration

What muscle is this? What action does this muscle perform?

External Oblique, Compresses abdominal wall

What muscle is this? What action does this muscle perform?

Internal Oblique, compresses abdominal wall

What muscle is this? What action does this muscle perform?

Serratus Anterior, Protracts and rotates scapula

What muscle is this? What action does this muscle perform?

Transversus Abdominis, Compresses abdominal contents

What muscle is this? What action does this muscle perform?

Zygomaticus Minor, Elevates upper lip

What muscle is this? What action does this muscle perform?

Sartorius, Flexs hip

What muscle is this? What action does this muscle perform?

Extensor digitorum longus, Extends toes

What muscle is this? What action does this muscle perform?

Gracilis, Adducts thigh

What muscle is this? What action does this muscle perform?

Soleus, Ankle Plantarflexion

What muscle is this? What action does this muscle perform?

Brachialis, Flexes elbow

What muscle is this? What action does this muscle perform?

Extensor Digitorum, Extends fingers

What muscle is this? What action does this muscle perform?

Palmaris Longus, tenses skin of palm

What muscle is this? What action does this muscle perform?

Flexor Carpi Ulnaris, Flexes Wrist

What muscle is this? What is an origin? What is an insertion? What is an action?

Muscle: zygomaticus major

Origin: zygomatic bone

Insertion: upper lip

Action: Smiles

What structure is this?

Illiotibial Band

What structure is this?

Linea Alba

What muscle is this? What action does this muscle perform?