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  • Anatomy & Physiology

    Muscles of the Lower Limbs

    http://www.ishapeup.com/musclecharts.html

  • Muscles of the Lower Limbs

     Among the strongest muscles in the body.

     Because pelvic girdle is composed of heavy,

    fused bone that allow little movement, no special

    group of muscles is necessary to stabilize it.

     Muscle that move leg form the flesh of the thigh.

     Muscles originating on the leg move the ankle

    and foot.

  • Muscles of the Lower Limbs

     Divided into 3 groups

     Muscles for Movement of the hip

     Muscles for Movement of the knee

     Muscles for Movement of the foot

  • Muscles of the Hip

     Iliacus

     Psoas Major

     Gluteus minimus

     Gluteus medius

     Gluteus maximus

  • Iliacus

    Origin – Iliac

    Insertion – tendon of

    Psoas

    Action – Hip flexion,

    (with Psoas major)

  • Psoas Major

    Origin – T12 and

    Lumbar vertebrae

    Insertion – lesser

    trochanter, femur

    Action - hip flexion

  • Gluteus Minimus

    Gluteus Medius

    Origin – Iliac, lateral

    surface

    Insertion – greater

    trochanter

    Action - abduction

  • Gluteus Maximus

    Origin – iliac, sacrum,

    coccyx

    Insertion – gluteal

    tuberosity, IT band

    Action – extension of

    thigh

  • Glute Muscles

  • Anterior Muscles of the Thigh Muscles that Extend the Knee

     Vastus lateralis

     Vastus medialis

     Vastus intermedius

     Rectus Femoris

     Sartorius

  • Muscles of the Thigh - Quadriceps

  •  Vastus Lateralis

     Vastus Intermidius

     Vastus Medilais

    Origin – Greater Trochanter

    Insertion – tibia via patella

    Action – leg extension

  • Rectus Femoris

    Origin – Ilium, acetabulum

    Insertion – tibia via patella

    Action – leg extension

    PLUS some hip flexion

  • Sartorius

    Origin – iliac spine

    Insertion – tibia, medial

    shaft

    Action – lateral rotation

    of thigh

  • Posterior Muscles of the Thigh Muscles that Flex the Knee

     Semimembranosus

     Semitendinosus

     Biceps femoris

  • Semimembranosus

    Semitendinosus

    Origin – ischial tuberosity

    Insertion –

    tibia medial condyle

    Action – leg flexion

  • Biceps Femoris

    Origin –

    ischial tuberosity (long)

    linea aspera of femur (short)

    Insertion – head of fibula

    Action – leg flexion

  • Adductor Muscles of the Thigh

     Adductor magnus

     Adductor brevis

     Adductor longus

     Gracilis

  • Adductor Brevis

    Adductor brevis

    Adductor longus

    Adductor magnus

    Origin – Pubis

    Insertion - Femur

    Action – adduction

  • Gracilis

    Origin – ischiopubic

    ramus

    Insertion - Upper medial

    shaft of tibia below

    sartorius

    Action – Adducts hip.

    Flexes knee and

    medially rotates flexed

    knee

  • Adductor

    Brevis

  •  Tibialis Anterior

     Extensor halluces longus

     Extensor digitorum

    longus

     Fibularis Tertius

     Fibularis Longus

     Fibularis brevis

    Muscles of the Anterior Compartment

    of the Lower Leg Primarily Flexes the Foot

  • Tibialis Anterior

    Origin – Tibia, lateral condyle

    Insertion – medial tarsal

    Action – dorsiflexion of the

    ankle

  • Extensor hallucis longus

    Origin – Anterior fibula

    Insertion – Distal phalanx of

    hallux

    Action – dorsiflexion of the

    ankle

    **Hallux means big toe**

  • Extensor digitorum

    longus Origin – Lateral condyle of

    tibia

    Insertion – middle and distal

    phalanges of 2nd & 5th

    digits

    Action – Extends 2nd & 5th

    distal Interphalangeal joints

  •  The tendon splits at the

    ankle into 5 branches

    4 to the lesser toes

    1 to the lateral foot

    Extensor digitorum longus

  • Fibularis (peroneus)

    tertius Origin – Anterior fibula

    Insertion – 5th metatarsal

    Action – Dorsiflexes the foot

    at the ankle. Everts the

    foot.

  • Fibularis (peroneus)

    longus Origin – Head of fibula

    Insertion – Medial cuneiform

    and 1st metatarsal

    Action – Plantar flexes the

    foot at the ankle. Everts the

    foot.

  • Fibularis (peroneus)

    brevis Origin – Distal fibula

    Insertion – 5th metatarsal

    Action – Plantar flexes the

    foot at the ankle.

    Everts the foot.

  • Muscles of the Posterior Compartment

    of the Lower Leg Primarily Extends the Foot

     Gastrocnemius

     Soleus

     Flexor digitorum longus

     Flexor halluces longus

     Tibialis Posterior

  • Gastrocnemius

    Origin – Lateral and medial

    condyles of the femur

    Insertion - Calcaneus

    Action – Plantar flexion

  • Soleus

    Origin – Posterior Head of

    the Fibula

    Insertion - Calcaneus

    Action – Plantar flexion

  • Flexor digitorum

    longus Origin – Posterior tibia

    Insertion – Distal phalanges

    of 2nd & 5th digits

    Action – Plantar flexion,

    Inverts the foot, flexes

    Interphalangeal joints

  • Flexor hallucis

    longus Origin – Middle shaft of fibula

    Insertion – Distal phalanx of

    hallux

    Action – Plantar flexion,

    Inverts the foot, flexes

    all joints of hallux

  • Tibialis posterior

    Origin – Proximal ends of the

    tibia and fibula

    Insertion – Navicular bone,

    2nd – 4th metatarsals.

    Action – Plantar flexion,

    Inverts the foot.

  • Overview of Muscles that Extend and

    Flex the Foot

  • Overview of Muscles that Extend and

    Flex the Foot

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