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Practical 2 - Skeletal muscles
Skeletal muscles
65
Anatomy
Undergraduate 2
04/06/2014

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Term
Frontal belly (Epicranius)
Definition
O: Galea aponeurotica
I: Skin of eyebrows
F: Raises eyebrows
Term
Occipital belly (Epicranius)
Definition
O: Occipital bone
I: Galea aponeurotica
F: pulls scalp posteriorly
Term
Orbicularis Oculi
Definition
O: Frontal bone
I: Eyelid tissue
F: Closes eyes
Term
Zygomaticus major
Definition
O: Zygomatic bone
I: Skin and muscle at mouth corner
F: Smiling
Term
Zygomaticus minor
Definition
O: Zygomatic bone
I: Skin and muscle at mouth corner
F: Smiling
Term
Orbicularis oris
Definition
O: Maxilla
I: Muscle and skin at angles of mouth
F: Closes lips
Term
Buccinator
Definition
O: Molar region of maxilla
I: Orbicularis oris
F: Compresses cheek
Term
Masseter
Definition
O: Maxilla
I: Ramus of mandible
F: Closes jaw
Term
Temporalis
Definition
O: Tempora fossa
I: Coronoid process of mandible
F: Closes jaw
Term
Platysma
Definition
O: Deltoid
I: Skin and muscle at corner of mouth
F: Tenses neck skin
Term
Sternocleidomastoid
Definition
O: Manubrium of sternum
I: Mastoid process of temporal bone
F: Flexion of neck forward
Term
Pectoralis major
Definition
O: Sternum
I: Intertubercular sulcus of humerus
F: Arm flexion
Term
Serratus anterior
Definition
O: Lateral aspect of ribs 1-8
I: Vertebral border of anterior surface of scapula
F: Rotates scapula
Term
Deltoid
Definition
O: Acromion of scapula
I: Deltoid tuberosity of humerus
F: Arm abduction
Term
Pectoralis minor
Definition
O: Anterior surface of ribs 3-5
I: Coracoid process of scapula
F: Draws scapula forward and inferiorly
Term
External intercostals
Definition
O: inferior border of rib above
I: Superior border of rib below
F: Inspiration
Term
Internal intercostals
Definition
O: Superior border of rib below
I: Inferior border of rib above
F: Expiration
Term
Diaphragm
Definition
O: Inferior border ofrib
I: Central tendon
F: Inspiration, flattens on contraction
Term
Rectus abdominis
Definition
O: Pubic crest
I: Xiphoid process of sternum
F: Rotates vertebral column
Term
External obliques
Definition
O: Anterior surface of last 8 ribs
I: Iliac crest
F: Trunk rotation
Term
Internal obliques
Definition
O: Iliac crest
I: Pubic crest
F: Trunk rotation
Term
Transversus abdominis
Definition
O: Iliac crest
I: Pubic crest
F: Compresses abdominal contents
Term
Trapezius
Definition
O: Occipital bone
I: Acromion of scapula
F: Extends head
Term
Latissimus dorsi
Definition
O: Iliac crest
I: Floor of intertubercular sulcus of humerus
F: Arm extension
Term
Infraspinatus (rotator cuff muscle)
Definition
O: Infraspinous fossa of scapula
I: Greater tubercle of humerus
F: Stabilizes shoulder
Term
Teres minor (rotator cuff muscle)
Definition
O: Lateral margin of scapula
I: Greater tubercle of humerus
F: Stabalizes shoulder
Term
Supraspinatus (rotator cuff muscle)
Definition
O: Supraspinous fossa of scapula
I: Greater tubercle of humerus
F: Stabalizes shoulder joint
Term
Teres major
Definition
O: Posterior surface at intferior angle of scapula
I: Intertubercular sulcus of humerus
F: Extends humerus
Term
Rhomboids major
Definition
O: Spinous process of vertebrae C7, T1 - T5
I: Medial border of scapula
F: Stabalizes scapula
Term
Rhomboids minor
Definition
O: Spinous process of vertebrae C7, T1 - T5
I: Medial border of scapula
F: Stabalizes scapula
Term
Triceps brachii
Definition
O: Distal radial groove on posterior humerus
I: Olecranon process of ulna
F: Forearm extension
Term
Biceps brachii
Definition
O: Coracoid process of scapula
I: Radial tuberosity
F: Elbow flexion
Term
Brachioradialis
Definition
O: Lateral ridge at distal end of humerus
I: Base of styloid process of radius
F: Synergist in forearm flexion
Term
Brachialis
Definition
O: Distal portion of anterior humerus
I: Coronoid process of ulna
F: Forearm flexor
Term
Pronator Teres
Definition
O: Medial epicondyle of humerus
I: Midshaft of radius
F: Pronate forearm
Term
Flexor carpi radialis
Definition
O: Medial epicondyle of humerus
I: Base of metacarpals 2 and 3
F: Abducts hand
Term
Palmaris longus
Definition
O: Medial epicondyle of humerus
I: Skin and fascia of palm
F: Tenses skin and fascia of palm
Term
Flexor carpi ulnaris
Definition
O: Medial epicondyle of humerus
I: Base of metacarpal 5
F: Flexes wrist
Term
Extensor carpi radialis longus
Definition
O: Lateral supracondylar ridge of humerus
I: Base of metacarpal 2
F: Extends wrist
Term
Extensor carpi radialis brevis
Definition
O: Lateral epicondyle of humerus
I: Base of metacarpal 3
F: Extends wrist
Term
Supinator
Definition
O: Lateral epicondyle of humerus
I: Proximal end of radius
F: Supinate forearm
Term
Extensor digitorum
Definition
O: Lateral epicondyle of humerus
I: Distal phalanges of fingers 2-5
F: Finger extension
Term
Extensor carpi ulnaris
Definition
O: Lateral epicondyle of humerus
I: Metacarpal 5
F: Extends wrist
Term
Iliopsoas (Iliacus)
Definition
O: Iliac crest
I: Lesser trochaner of femur
F: Flexes thigh
Term
Sartorius
Definition
O: Anerior superior iliac spine
I: Medial aspect of proximal tibia
F: Flexes knee
Term
Adductor magnus
Definition
O: Ischial tuberosity
I: Adductor tubercle of femur
F: Flexes thigh
Term
Adductors longus
Definition
O: Pubis near pubic symphysis
I: Linea aspera
F: Flexes thigh
Term
Gracilis
Definition
O: Body of pubis
I: Medial surface of tibia just inferior to medial condyle
F: Adducts thigh
Term
Rectus femoris (quads)
Definition
O: Anterior inferior iliac spine
I: Patella
F: Extends knee
Term
Vastus lateralis (quads)
Definition
o: Greater trochanter
I: Patella
F: Extends knee
Term
Vastus medialis (quads)
Definition
O: Linea aspera
I: Patella
F: Extends knee
Term
Vastus intermedius (quads)
Definition
O: Anterior and lateral surface of femur
I: Patella
F: Extends knee
Term
Tensor fasciae latae
Definition
O: Anterior aspect of iliac crest
I: Iliotibial tract
F: Steadies trunk
Term
Biceps femoris (hamstrings)
Definition
O: Distal femur
I: Head of fibula
F: Flexes knee
Term
Semitendinosus (hamstrings)
Definition
O: Ischial tuberosity
I: Medial aspect of upper tibial shaft
F: Flexes knee
Term
Semimembranosus (hamstrings)
Definition
O: Ischial tuberosity
I: Medial condyle of tibia
F: Flexes knee
Term
Gluteus maximus
Definition
O: Coccyx
I: Gluteal tuberosity of femur
F: Thigh Extensor
Term
Gluteus medius
Definition
O: Upper lateral surface of ilium
I: Greater trochanter of femur
F: Medially rotates thigh
Term
Tibialis anterior
Definition
O: Lateral condyle and upper 2/3 of tibia
I: Metatarsal 1
F: Inverts foot
Term
Extensor digitorum longus
Definition
O: Lateral condyle of tibia
I: middle & distal phalanges of toes 2-5
F: Toe extension
Term
Gastrocnemius
Definition
O: Lateral condyles of femur
I: Calcaneus via calcaneal tendon
F: Flexes knee
Term
Soleus
Definition
O: Proximal portion of tibia and fibula
I: Calcaneus via calcaneal tendon
F: Plantar flexion
Term
Popliteus
Definition
O: Lateral condyle of femur
I: Proximal tibia
F: Flexes and rotates leg medially to unlock extended knee when knee flexion begins
Term
Tibialis posterior
Definition
O: Superior portion of tibia and fibula
I: Several tarsals and metatarsals 2-4
F: Foot inversion
Term
Flexor digitorum longus
Definition
O: Posterior surface of tibia
I: Distal phalanges 2-5
F: Flexes toes
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