Leg muscles: Lateral group

Muscles of the leg: Lateral groupAnatomy, function, blood supply and innervation of muscles of the leg
~ 3 min

In this pdf-note, we’ll start with the borders of the lower limb:

  • The posterior border passes through the coccyx and the lateral margins of the sacrum

  • The lateral border is the iliac crest

  • The anterior border passes through the inguinal ligament and the pubic symphysis

Borders of the lower limb
Borders of the lower limb
Borders of the lower limb
Borders of the lower limb

There are several regions within the lower limb:

  1. Gluteal region (regio glutealis)

  2. Femoral region (regio femoralis)

  3. Knee region (regio genus)

  4. Leg region (regio cruralis)

  5. Ankle region (regio talocruralis)

  6. Foot region (regio pedis)

Regions within the lower limb
Regions within the lower limb
Regions within the lower limb
Regions within the lower limb

Within these areas, the muscles of the lower limb are located.

These include:

  • Pelvic girdle muscles

  • Muscles of the free part of lower limb

    The muscles of the free part of the lower limb are divided into:

  • Thigh muscles

  • Leg muscles

  • Foot muscles

    The leg muscles form three groups:

  • The anterior group consists of the extensors of the foot

  • The posterior group consists of the flexors and supinators of the foot

  • The lateral group consists of the foot abductor muscles The lateral group includes the following muscles:

  • Peroneus longus muscle (m. peroneus longus / m. fibularis longus), which has two heads: anterior and posterior.

    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle (m. peroneus longus / m. fibularis longus)
    Peroneus longus muscle
    (m. peroneus longus / m. fibularis longus)

    Origin:

    Anterior head (caput anterius) consists of the head of the fibula and the lateral condyle of the tibia

    Posterior head (caput posterius) is the lateral surface of the fibula

    Insertion: inserts as a single tendon into the plantar surface of the bases of the 1st and the 2nd metatarsals, as well as into the medial sphenoidal bone

    Function: abducts the foot (lifts its lateral edge), flexes and pronates the foot

    Innervation: superficial fibular nerve (L4-S1)

    Blood supply: peroneal artery, inferior lateral genicular artery

  • Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)

Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle (m. peroneus brevis / m. fibularis brevis)
Peroneus brevis muscle
(m. peroneus brevis / m. fibularis brevis)

Origin: lower two-thirds of the lateral surface of the fibula, intermuscular septum of the leg

Insertion: tuberosity of the 5th metatarsal

Function: abducts the foot (lifts its lateral edge), flexes the foot (plantar flexion)

Innervation: superficial fibular nerve (L4-S1)

Blood supply: peroneal artery

Dictionary

Muscles of the leg

Gluteal region
regio glutealis
Femoral region
regio femoralis
Knee region
regio genus
Leg region
regio cruralis
Ankle region
regio talocruralis
Foot region
regio pedis
Peroneus longus muscle
m. peroneus longus / m. fibularis longus
Peroneus brevis muscle
m. peroneus brevis / m. fibularis brevis
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