Thigh muscles: Medial group

Muscles of the thigh: Medial groupAnatomy, function, blood supply and innervation of muscles of the thigh
~ 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 thigh muscles form three groups:

  • The anterior group consists of the thigh flexors and the leg extensors

  • The posterior group consists of the thigh extensors and the leg flexors

  • The medial group consists of the thigh adductor muscles The medial group includes the following muscles:

  • Gracilis muscle (m. gracilis)

    Gracilis muscle (m. gracilis)
    Gracilis muscle (m. gracilis)
    Gracilis muscle (m. gracilis)
    Gracilis muscle (m. gracilis)
    Gracilis muscle (m. gracilis)
    Gracilis muscle (m. gracilis)
    Gracilis muscle
    (m. gracilis)

    Origin: inferior half of the pubic symphysis, inferior branch of the pubis

    Insertion: tibial tuberosity. Together with the tendons of the sartorius and semitendinosus muscles, it forms pes anserinus superficialis (pes anserinus superficialis)

    Function: adducts the thigh, flexes the leg at the knee joint, pronates the leg

    Innervation: obturator nerve (L2-L4)

    Blood supply: obturator artery, deep external pudendal artery, femoral artery

  • Pectinate muscles (m. pectineus)

    Pectinate muscles (m. pectineus)
    Pectinate muscles (m. pectineus)
    Pectinate muscles (m. pectineus)
    Pectinate muscles (m. pectineus)
    Pectinate muscles
    (m. pectineus)

    Origin: crest of the pubis, superior branch of the pubis

    Insertion: pectineal line of the femur

    Function: adducts and flexes the thigh

    Innervation: зobturator nerve (L2-L3)

    Blood supply: obturator artery, deep external pudendal artery, deep artery of the thigh

  • Adductor longus muscle (m. adductor longus)

    Adductor longus muscle (m. adductor longus)
    Adductor longus muscle (m. adductor longus)
    Adductor longus muscle (m. adductor longus)
    Adductor longus muscle (m. adductor longus)
    Adductor longus muscle
    (m. adductor longus)

    Origin: superior branch of the pubis

    Insertion: medial lip of the linea aspera

    Function: adducts, flexes and supinates the thigh

    Innervation: obturator nerve (L2-L3)

    Blood supply: obturator artery, deep external pudendal artery, deep artery of the thigh

  • Adductor brevis muscle (m. adductor brevis)

    Adductor brevis muscle (m. adductor brevis)
    Adductor brevis muscle (m. adductor brevis)
    Adductor brevis muscle (m. adductor brevis)
    Adductor brevis muscle (m. adductor brevis)
    Adductor brevis muscle
    (m. adductor brevis)

    Origin: inferior branch of the pubis, body of the pubis

    Insertion: medial lip of the linea aspera

    Function: adducts, flexes and supinates the thigh

    Innervation: obturator nerve (L2-L3)

    Blood supply: obturator artery, perforating arteries

  • Adductor magnus muscle (m. adductor magnus)

Adductor magnus muscle (m. adductor magnus)
Adductor magnus muscle (m. adductor magnus)
Adductor magnus muscle (m. adductor magnus)
Adductor magnus muscle (m. adductor magnus)
Adductor magnus muscle
(m. adductor magnus)

Origin: ischial tuberosity, ischium ramus, inferior pubic ramus

Insertion: medial lip of the linea aspera; a small part inserts into the medial epicondyle of the femur

Function: adducts, flexes and supinates the thigh

Innervation: obturator nerve (L2-L3), branches of the sciatic nerve (L4-L5)

Blood supply: obturator artery, perforating arteries

Dictionary

Muscles of the thigh

Gluteal region
regio glutealis
Femoral region
regio femoralis
Knee region
regio genus
Leg region
regio cruralis
Ankle region
regio talocruralis
Foot region
regio pedis
Gracilis muscle
m. gracilis
Pectineus muscle
m. pectineus
Adductor longus muscle
m. adductor longus
Adductor brevis muscle
m. adductor brevis
Adductor magnus muscle
m. adductor magnus
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