Common Actions of Muscles.docx

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Kinesiology & Health Science
KINE 2031
Nicolette S Richardson

Common Actions: (Upper Limb)  Shoulder Gridle o Adduction of Scapula  Trapezius  Rhomboids o Abduction of Scapula  Serratus Anterior o Rotation of Scapula  Trapezius (superior part-upward)  Serratus Anterior (upward)  Rhomboids (downward)  Levator Scapulae (downward) *only if one set is contracting o Elevation of Scapula  Trapezius  Levator Scapula  *if only one set of these muscles contract: movement of neck, lateral flexion of neck o Depression of Scapula  Trapezius (inferior part)  Serratus Anterior  Pectoralis Minor  Shoulder Joint o Shoulder Extension  Deltoid (Posterior/Spinal Head)  Lattisimus Dorsi  Triceps Brachii (LONG head) o Shoulder Flexion  Deltoid (Anterior/Clavicular Head)  Pectoralis Major  Briceps Brachii  Coracobrachialis o Adduction of Humerus  Pectoralis Major  Lattisimus Dorsi  Teres Major  Infraspinatus/Teres Minor (little) o Abduction of Humerus  Deltoid (Lateral/Acromial Head)  Supraspinatus (initiates abduction) * IMPORANT  Subscapularis (little) o Medial Rotation  Subscapularis o Lateral Rotation  Infraspinatus  Teres Minor  Elbow Joint o Elbow Flexion  Biceps Brachii  Brachialis  Brachioradialis (ONLY when elbow is semi-pronated)  Palmaris Longus (agonist) o Elbow Extension  Triceps Brachii (long, medial, lateral)  Supinator (assist) o Wrist/Elbow Flexion  Flexor Carpi Radialis  Flexor Carpi Ulnaris  Flexor Digitorum Superficialis (+metacarpal-phalangeal + interphalangeal)  to middle phalanges o Wrist/Elbow Extension nd  Extensor Carpi Radialis Longus (to 2 metacarpal)  Extensor Carpi Radialis Brevis (to 3 metacarpal)  Extensor Carpi Ulnaris (5 metacarpal)  Extensor Digitorum Communis (to the phalanges)  Extensor Digiti Minimi (to the phalanges –pinky) o Wrist Flexion st nd  Flexor Digitorum Profundus (+metacarpal-phalangeal + 1 & 2 interphalangeal joint)  to distal phalanges (different origin)  Flexor Pollicis Longus (distal phalange of THUMB= pollicis) o Wrist Extension  Extensor Pollicis Longus  distal phalange of THUMB  Extensor Pollicis Brevis  middle phalange of THUMB  Extensor Indicis  Index phalange o Wrist Abduction  Flexor Carpi Radialis  Extensor Carpi Radialis Longus + Brevis  Adductor Pollicis Longus o Wrist Adduction  Flexor Carpi Ulnaris  Extensor Carpi Ulnaris o Supination  Supinator o Pronation  Pronator Teres  Pronator Quadratus  Intrinsic Muscles of the Hand o Opposition  Thenar (thumb side =lateral)  Hypothenar (pinky side = medial) o Interossei  Between metacarpals to proximal phalanges  Abduction/Adduction o Lumbricals  Unique because originate on a tendon (flexor Digitorum Profundus)  Insert on dorsal expansion  Flexion of metacarpals  Extension of phalanges Common Actions (Trunk Muscles)  Spinal Extensors o Spinal extension  Sternocleidomastoid (unique) o Rotation of head o Flexion of neck o Extension of head  Diaphragm o Expanding thorax in inspiration  Intercostals (keep ribs in proper position+ protection of anything going through ribs to internal organs) o Internal  Hands connected at the sternum (fiber direction)  Pull each rib DOWN, compress the thoracic cage (expiration) o External  Hands in the pockets (fiber direction)  Pull each rib UP, expanding thoracic cage (inspiration)  Abdominals o Stabilization of vertebral column o Move the trunk relative to pelvic girdle o Protect underlying tissue o Inguinal Ligament  Anatomical landmark from trunk muscles to lower torso  Folding of the abdominal aponeurosis  Just underneath pass through femoral artery/vein o External Abdominal Oblique (outermost)  Ribs to linea alba  Fingers in the pocket  Flex the trunk  Lateral flexion of trunk  Rotation of trunk o Internal Abdominal Oblique  Perpendicular to external oblique (meshwork=protective)  Underneath aponeurosis  Trunk flexion  Lateral flexion  Rotation = opposite side of the muscle o Transverse Abdominalis (innermost)  Horizontal direction  Mesh for protective purposes  Increase intra-abdominal pressure (squeeze) of abdominal contents  Little bit of rotation o Rectus Abdominalis  Long strap like muscle  “6-pack appearance)  VERY powerful flexors of the trunk  Segmented  B/C very long muscles can produce lots of movement but very little force  Good to have strong abs to flatten lumber region of spine (curvature)  Upper rotation o “Valsava Effect” Common Actions (Lower Limb)  Hip Flexors o Iliopsoas Muscle (Deep)  Psoas Major: from lumber vertebrae  Iliacus: from iliac fossa  UNDER inguinal ligament  Common insertion point: less trochanter femur  POWERFUL hip flexors o Rectus Femoris  One of the quadriceps muscles  Longest one out of four  Only rectus femoris that passes hip joint  Sartorius o Used to flex the knee and lateral ROTATION OF HIP, flex the hip and medial rotates the tibia  Cross your legs o Longest muscle in the body o TAILORS muscle  Adductors and Hip Flexors (in order) o Origin: PUBIC BONE o Pectineus  C-shape  Shortest  Pulled groin muscle o Adductor Brevis o Adductor Longus o Adductor Magnus  Exception  U-shape  Joins with ishium (end of pubic bone)  Lower end of the tibia  BIG muscle  Practical Application: Football  Kicking up-ball o Gracilis  Adduct of
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