Muscles Flashcards
Erector Spinae Group
Ori: posterior iliac crest/sacrum
Ins: TVPs, SPs, SCM
Fun: 1 - extend vertebral column
2 - extend head
3 - posture
4 - lateral flex. column
Nerve: Posterior Rami of Spinal Nerves
Sternocleidomastoid
Ori: medial clavicle, manubrium
Ins: mastoid process, superior nuchal line of occipital bone
Fun: 1 - lat flex. head and neck
2 - contralateral rotation head and neck
3 - ext. head and upper neck
4 - flex lower neck
5 - elevate sternum and clavicle (force inh)
Nerve: Spinal Accessory Nerve
Scalene Group
Ori: TVPs of C3-C7
Ins: ant and mid 1st rib, post 2nd rib
Fun: 1 - Lat flex of neck
2 - elevate 1st and 2nd ribs
during forced inhalation
Nerve: Anterior rami C3-C7
Temporalis
Ori: Temporal fossa and fascia
Ins: coronoid process, ramus of mandible
Fun: 1 - elevate mandible
2 - retract mandible
Nerve: Mandibular nerve (V3)
Masseter
Ori: Zygomatic arch
Ins: ramus of mandible
Fun: 1 - elevate mandible
2 - protract mandible
Nerve: Mandibular nerve (V3)
Rectus Abdominis
Ori: Pubic crest and pubic symphysis
Ins: Xiphoid process, cartilages of ribs 5,6,7
Fun: 1 - flex trunk
2 - posterior pelvic tilt
3 - compress ab contents
Nerve: Intercostal Nerves (T6-T12)
External Abdominal Obliques
Ori: External surface lower 8 ribs
Ins: Linea alba, pubic tubercle, anterior iliac crest
Fun: 1 - Flex trunk
2 - Contralateral rotation trunk
3 - compress ab contents
Nerve: Intercostal Nerves (T7-T12)
Rhomboid Major and Minor
Ori: m- SPs of C7 and T1
M - SPs of T2-T5
Ins: m - medial border scap and root of spine
M - medial border scap and inf. spine
Fun: 1 - Retraction of scaps
2 - Elevate scaps
3 - Downward rotation of scaps
Nerve: Dorsal Scapular
Trapezius
Ori: Occipital protuberance, ligamentum nuchae, C7-T12
Ins: Lateral clavicle, acromion, spine of scap
Fun: Upper - elevate and upward rot scap
Middle - retract scaps
Lower - depress and upward rot scap
Nerve: Spinal Accessory Nerve
Latissimus Dorsi
Ori: SPs T7-L5, Crest of ilium and sacrum, lowest 4 ribs, thoracolumbar fascia
Ins: Intertubercular groove of humerus
Fun: 1 - ext of arm
2 - add of arm
3 - med rot of arm
4 - anterior pelvis tilt
Nerve: Thoracodorsal Nerve
Serratus Anterior
Ori: Upper 9 ribs
Ins: Anterior surface of medial border of scaps
Fun: 1 - Protraction of scaps
2 - Upward rot of scaps
Nerve: Long Thoracic Nerve
Pectoralis Major
Ori: Medial clavicle, sternum, costal cartilages ribs 1-7
Ins: Bicipital groove of humerus
Fun: 1- flex arm
2 - add of arm
3 - med rot of arm
4 - horizontal add of arm
Nerve: Medial and Lateral Pectoral Nerves
Deltoid
Ori: Lateral clavicle, acromion, spine of scap
Ins: Deltoid tuberosity of humerus
Fun: Abd of shoulder
Nerve: Axillary Nerve
Subscapularis
Ori: Subscapular fossa
Ins: Lesser tubercle of humerus
Fun: Med rot of shoulder
Nerve: Upper and Lower Subscapularis Nerves
Supraspinatus
Ori: Supraspinous fossa
Ins: Greater tubercle of humerus
Fun: Abd of shoulder joint
Nerve: Suprascapular nerve
Infraspinatus
Ori: Infraspinous fossa
Ins: Greater tubercle of humerus
Fun: Lat rot of shoulder
Nerve: Suprascapular Nerve
Teres Major
Ori: Inferior lateral border scap
Ins: Medial lip of intertubercular groove
Fun: 1 - Ext shoulder joint
2 - Add shoulder joint
3 - Med rot shoulder joint
Nerve: Upper and Lower Subscapular Nerve
Teres Minor
Ori: Superior lateral border scap
Ins: Greater tubercle of humerus
Fun: Lat rot of shoulder
Nerve: Axillary Nerve
Biceps Brachii
Ori: Coracoid process of scap, supraglenoid process of scap
Ins: radial tuberosity
Fun: 1 - flex forearm
2 - flex arm
3 - supinate forearm
Nerve: Musculocutaneous Nerve
Triceps Brachii
Ori: Infraglenoid process of scap, posterior surface humerus
Ins: Olecranon process
Fun: 1 - ext arm
2 - ext forearm
Nerve: Radial Nerve
Pronator Teres
Ori: Medial epi of humerus and coronoid process of ulna
Ins: Middle of lateral surface radius
Fun: pronate forearm
Nerve: Median Nerve
Flexor Carpi Radialis
Ori: Medial epi of humerus
Ins: Base of 2nd and 3rd MC
Fun: 1 - flex wrist
2 - radial deviation
Nerve: Median Nerve
Flexor Carpi Ulnaris
Ori: Medial epi of humerus, olecranon process and posterior border ulna
Ins: Base of 5th MC, hook of hamate, pisiform
Fun: 1 - flex wrist
2 - ulnar deviation
3 - elbow flexion
Neve: Ulnar Nerve
Flexor Digitorum Superficialis
Ori: Medial epi of humerus, coronoid process of ulna, anterior border radius
Ins: Base of middle phalanges fingers 2-5
Fun: 1 - flex fingers 2-5 at MCPs and
PIPs
2 - Flex wrist
Nerve: Median Nerve
Extensor Carpi Radialis Longus
Ori: Lateral supracondylar ridge of humerus
Ins: base of 2nd MC
Fun: 1 - Ext wrist
2 - Radial deviation
Nerve: Radial Nerve
Brachioradialis
Ori: Lat supracondylar ridge of humerus
Ins: Lat radius proximal to styloid
Fun: Flex forearm
Nerve: Radial Nerve
Extensor Digitorum
Ori: Lat epi of humerus
Ins: Distal and middle phalanges fingers 2-5
Fun: 1 - ext fingers 2-5
2 - ext wrist joint
3 - ext elbow joint
Nerve: Radial Nerve
Abductor Pollicis Longus
Ori: Middle of radius, ulna, interosseous membrane
Ins: Base of 1st MC
Fun: 1 - abd thumb at CMC joint
2 - ext thumb at CMC joint
3 - radial deviation
Nerve: Radial Nerve
Abductor Pollicis Brevis
Ori: Flexor retinaculum, scaphoid and trapezium tubercles
Ins: Proximal phalanx of thumb
Fun: Abd thumb
Nerve: Median Nerve
Flexor Pollicis Brevis
Ori: Flexor retinaculum, trapezium
Ins: Proximal phalanx of thumb
Fun: Flex thumb
Nerve: Median Nerve
Dorsal Interossei
Ori: Adjacent sides of metacarpals
Ins: Base of proximal phalanges and DDE of fingers 2,3,4
Fun: 1 - Abd of fingers 2-4 at
MCPs
2 - Flex of fingers 2-4 at
MCPs
3 - Ext of fingers 2-4 PIP and DIP
Nerve: Ulnar Nerve
Tensor Fascia Lata
Ori: ASIS, Iliac crest
Ins: Tibia via IT band
Fun: 1 - flex hip joint
2 - abd. hip joint
3 - med rot hip joint
4 - anterior pelvic tilt
Nerve: Superior Gluteal Nerve
Sartorius
Ori: ASIS
Ins: Medial surface tibia
Fun: 1 - flex hip joint
2 - abd. hip joint
3 - lat rot hip joint
4 - flex knee joint
5 - med. rot knee joint
Nerve: Femoral Nerve
Biceps Femoris
Ori: Ischial tuberosity, Linea aspera
Ins: Head of fibula, lat condyle of tibia
Fun: 1 - flex knee joint
2 - ext hip joint
3 - lat rot knee joint
Nerve: Sciatic Nerve
Semitendinosus
Ori: Ischial tuberosity
Ins: Proximal medial aspect of the tibia
Fun: 1 - flex knee joint
2 - ext hip joint
3 - med rot knee joint
Nerve: Sciatic Nerve
Rectus Femoris
Ori: ASIS, groove of acetabulum
Ins: Pase of patella via quad tendon, tibial tuberosity
Fun: 1 - ext of knee joint
2 - flex of hip joint
Nerve: Femoral Nerve
Vastus Medialis
Ori: Intertrochanteric line of femur, lines aspects, supracondylar line
Ins: Medial border of patella via quad tendon, tibial tuberosity
Fun: ext. of knee
Nerve: Femoral Nerve
Adductor Muscles Group
Ori: Pubic ramus and ischium
Ins: Linea aspera
Fun: 1 - add of hip
2 - flex of hip joint
3 - lat rot of hip joint
Nerve: Obturator Nerve
Gastrocnemius
Ori: Med and Lat condyles of femur
Ins: Calcaneus (via schilles tendon)
Fun: 1 - plantar flex ankle joint
2 - flex knee joint
Nerve: Tibial Nerve
