Upgrade to remove ads
Only $2.99/month

Threlfall: Muscles, Origin, Insertion, Action

Terms in this set (71)

Buccinator
O-Maxilla & mandible
I-Orbicularis Oris
A-Compresses Cheek
Lateral Pterygoid
O-Greater wing of the sphenoid bone & pterygoid process
I-Mandibular condyle
A-Depresses & protracts mandible;
Moves jaw laterally
Masseter
O-Maxilla & zygomatic arch
I-Angle & ramus of mandible
A-Elevates mandible
Medial Pterygoid
O-Pterygoid process, palatine bone, & maxilla
I-Ramus & angle of mandible
A-Elevates & protracts mandible;
Moves jaw laterally
Orbicularis Oculi
O-Bones of the orbit
I-Tissue of the eyelid
A-Close eye
Orbicularis Oris
O-Fascia surrounding lips
I-Mucosa of lips
A-Close lips
Temporalis
O-Temporal Fossa
I-Coronoid Process & ramus of the mandible
A-Elevates & retracts mandible
Zygomaticus Major
O-Zygomatic bone
I-Orbicularis Oris
A-Smiling
Splenius Capitis
O-Spinous process of C7 & T1 - T3
I-Superior nuchal line & mastoid process
A-Extend & rotate head at neck;
Hyperextend neck
Sternocleidomastoid
O-Sternum & Clavicle
I-Mastoid process of the temporal bone & superior nuchal line
A-Flexes head bilaterally;
Rotates head unilaterally
Erector Spinae
O-Ribs, vertebrae, sacrum, & ilium
I-Ribs, vertebrae, & skull
A-Extension of vertebral column
Diaphragm
O-Xiphoid process, last 6 ribs, Lumbar vertebrae
I-Central Tendon
A-Increases vertical dimension of the thorax
External Abdominal Intercostals
O-Inferior border of rib above
I-Superior border of rib below
A-Elevates ribs
Internal Abdominal Intercostals
O-Superior border of rib below
I-Inferior border of rib above
A-Depresses ribs
Transverse Abdominus
O-Last 6 ribs, iliac crest, lumbar fascia
I-Linea alba & pubic crest
A-Compress abdomen
Erector Spinae
O-Ribs, vertebrae, sacrum, & ilium
I-Ribs, vertebrae, skull
A-Extension of vertebral column
External Abdominal Oblique
O-Lower 8 Ribs
I-Linea Alba & Iliac Crest
A-Flexes & rotates spine;
Compress abdomen
Internal Abdominal Oblique
O-Iliac crest & lumbodorsal fascia
I-Linea alba & lower 4 ribs
A-Flexes & rotates spine;
Compress abdomen
Rectus Abdominus
O-Pubic Crest
I-Xiphoid process, cartilage of ribs 5-7
A-Flexes spine;
Compress abdomen
Coracobrachialis
O-Coracoid process of scapula
I-Middle medial border of humerus
A-Flexes & adducts arm
Deltoid
O-Clavicle & spine of scapula
I-Deltoid tuberosity of humerus
A-Flexes, extends & abducts arm
Infraspinatus
O-Infraspinous fossa of scapula
I-Greater tubercle of humerus
A-Rotates humerus laterally;
Slight adduction
Latissimus Dorsi
O-Spinous processes of T6 - L5, Iliac crest, last 3 ribs
I-Intertubercular groove of humerus
A-Extends, adducts & medially rotates humerus
Levator Scapulae
O-First 3-4 cervical vertebrae
I-Superior angle of scapula
A-Elevates scapula
Pectoralis Major
O-Clavicle, sternum, costal cartilage, true ribs
I-Anterior aspect of proximal end of humerus
A-Flexes, adducts, & medially rotates humerus
Pectoralis Minor
O-Ribs 3-5
I-Coracoid process of the scapula
A-Depress shoulder;
Draws shoulders forward
Rhomboideus Major
O-Spines of T2 - T5
I-Vertebral border of scapula
A-Elevates & adducts scapula
Rhomboideus Minor
O-Spines of C7 & T1
I-Medial border of scapula
A-Elevates & adducts scapula
Serratus Anterior
O-First 8-9 ribs
I-Medial border of the scapula
A-Pulls shoulder forward;
Abducts & rotates it forward
Supraspinatus
O-Supraspinous fossa of scapula
I-Greater tubercle of humerus
A-Abducts arm; slight lateral rotation
Teres Major
O-Inferior angle of scapula
I-Proximal end of humerus
A-Extends, adducts & medially rotates humerus
Teres Minor
O-Axillary border of scapula
I-Proximal end of humerus
A-Adducts & laterally rotates humerus
Trapezius
O-Spines of C7 - T12
I-Clavicle & spine of scapula
A-Elevates, adducts, & depresses scapula
Biceps Brachii
O-Scapula near glenoid fossa & coracoid process
I-Radial tuberosity
A-Flexes elbow;
Supinates forearm
Brachialis
O-Anterior surface of humerus
I-Coronoid process & tuberosity of ulna
A-Flexes elbow
Brachioradialis
O-Distal end of humerus
I-Styloid process of radius
A-Flexes elbow
Palmaris Longus
O-Medial epicondyle of humerus
I-Radial tuberosity OR palmar aponeurosis
A-Flexes elbow;
Flexes wrist
Pronator Teres
O-Medial epicoldyle of humerus & coronoid process of ulna
I-Lateral surface of middle of radius
A-Pronates forearm
Supinator
O-Lateral epicondyle of humerus
I-Proximal radius
A-Supinates forearm
Triceps Brachii
O-Scapula near glenoid fossa & proximal humerus
I-Olecranon process of ulna
A-Extends elbow
Extensor Group
O-Humerus
I-Metacarpals
A-Extends hand at wrist
Flexor Group
O-Humerus
I-Metacarpals
A-Flexes hand at wrist
Biceps Femoris
(Hamstring)
O-Ischial tuberosity & femur
I-Head of fibula & lateral condyle of tibia
A-Extends thigh;
Flexes knee
Gluteus Maximus
O-Iliac crest, sacrum, coccyx
I-Iliotibial tract of fascia latae & gluteal tuberosity
A-Extends, abducts & rotates femur laterally
Gluteus Medius
O-Ilium
I-Greater trochanter
A-Abducts & rotates femur medially
Gluteus Minimus
O-Ilium
I-Greater trochanter
A-Adbucts & rotates femur medially
Gracilis
O-Pubic bone
I-Medial surface of tibia
A-Adducts thigh;
Flexes knee
Iliopsoas- iliacus
O-Iliac crest & iliac fossa
I-Tendon of psoas major
A-Flexes hip joint
Iliopsoas- Psoas Major
O-Transverse processes & body of lumbar vertebrae
I-Lesser trochanter of femur
A-Flexes hip joint;
Flexes vertebral column
Sartorius
O-Anterior, superior iliac spine
I-Medial surface of tibia
A-Flexes & rotates thigh laterally;
Flexes knee
Semimembranosus (Hamstring)
O-Ischial tuberosity
I-Medial condyle of tibia
A-Extends thigh;
Flexes knee
Semitendinosus (Hamstring)
O-Ischial tuberosity
I-Medial condyle & shaft of tibia
A-Extends thigh;
Flexes knee
Tensor Fascia Latae
O-Iliac crest
I-Iliotibial tract of fascia latae
A-Flexes & abducts femur
Adductor Longus
O-Anterior pubic bone
I-Femur
A-Flexes & adducts femur
Pectineus
O-Pubic bone
I-Medial aspect of femur
A-Flexes, adducts & rotates thigh medially
Rectus Femoris (Quadricep)
O-Anterior, inferior iliac spine
I-Upper border of patella
A-Flexes thigh;
Extends knee
Biceps Femoris
(Hamstring)
O-Ischial tuberosity & femur
I-Head of fibula & lateral condyle of tibia
A-Flexes knee;
Extends thigh
Gastrocnemius
O-Medial & lateral condyles of femur
I-Calcaneus by Achilles Tendon
A-Flexes knee;
Extends foot at ankle
Gracilis
O-Pubic bone
I-Medial surface of tibia
A-Flexes knee;
Adducts thigh
Sartorius
O-Anterior, superior iliac spine
I-Medial surface of tibia
A-Flexes knee;
Flexes & rotates thigh laterally;
Semimembranosus (Hamstring)
O-Ischial tuberosity
I-Medial condyle of tibia
A-Flexes knee;
Extends thigh
Semitendinosus (Hamstring)
O-Ischial tuberosity
I-Medial condyle & shaft of tibia
A-Flexes knee;
Extends thigh
Vastus Intermedius (Quadricep)
O-Anterior & lateral surface of femur
I-Patella & tibial tuberosity
A-Extends knee
Vastus Lateralis (Quadricep)
O-Greater trochanter of femur
I-Patella & tibial tuberosity
A-Extends knee
Vastus Medialis (Quadricep)
O-Medial side of proximal aspect of femur
I-Patella & tibial tuberosity
A-Extends knee
Gastrocnemius
O-Medial & lateral condyles of femur
I-Calcaneus by Achilles Tendon
A-Extends foot at ankle;
Flexes knee
Peroneus Brevis (Fibularis)
O-Body of fibula
I-5th metatarsal
A-Everts foot;
Assists in extension of foot at ankle
Peroneus Longus (Fibularis)
O-Head, body & lateral condyle of fibula
I-1st metatarsal & 1st cuneiform
A-Everts foot;
Assists in extension of foot at ankle
Soleus
O-Head of fibula & medial border of tibia
I-Calcaneus by Achilles tendon
A-Extends foot at ankle
Tibialis Anterior
O-Lateral condyle & body of tibia
I-1st metatarsal & 1st cuneiform
A-Flex foot at ankle;
Inverts foot
Tibialis Posterior
O-Membrane between tibia & fibula
I-2nd, 3rd, & 4th metatarsals, navicular bone, cuboid bone, 3rd cuneiform
A-Extends foot at ankle & inverts foot
YOU MIGHT ALSO LIKE...