medial femoral circumflex artery, iliac branch of iliolumbar artery
Nerve
femoral nerve
Actions
flexes and rotates medially thigh[citation needed]
Antagonist
Gluteus maximus
Identifiers
Latin
musculus iliacus
TA
A04.7.02.003
FMA
22310
Anatomical terms of muscle
[edit on Wikidata]
The iliacus is a flat, triangular muscle which fills the iliac fossa. It forms the lateral portion of iliopsoas, providing flexion of the thigh and lower limb at the acetabulofemoral joint.
Contents
1Structure
1.1Nerve supply
2Function
3Additional images
4Notes
5References
6External links
Structure
The iliacus arises from the iliac fossa on the interior side of the hip bone, and also from the region of the anterior inferior iliac spine (AIIS). It joins the psoas major to form the Iliopsoas as which it proceeds across the iliopubic eminence through the muscular lacuna to its insertion on the lesser trochanter of the femur. Its fibers are often inserted in front of those of the psoas major and extend distally over the lesser trochanter.
[1]
Nerve supply
The iliopsoas is innervated by the femoral nerve and direct branches from the lumbar plexus.[2]
Function
In open-chain exercises, as part of the iliopsoas, the iliacus is important for lifting (flexing) the femur forward (e.g. front scale). In closed-chain exercises, the iliopsoas bends the trunk forward and can lift the trunk from a lying posture (e.g. sit-ups, back scale) because the psoas major crosses several vertebral joints and the sacroiliac joint. From its origin in the lesser pelvis the iliacus acts exclusively on the hip joint.[1]
Additional images
Position of iliacus muscle (shown in red.) Animation.
Right hip bone. Internal surface. (Iliac fossa visible at upper left.)
Notes
^ abPlatzer (2004), p 234
^Thieme Atlas of Anatomy (2006), p 422
References
Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). Thieme. ISBN 3-13-533305-1.
Thieme Atlas of Anatomy: General Anatomy and Musculoskeletal System. Thieme. 2006. ISBN 1-58890-419-9.
External links
Wikimedia Commons has media related to Iliacus muscles.
PTCentral
Anatomy figure: 40:07-05 at Human Anatomy Online, SUNY Downstate Medical Center - "Muscles and nerves of the posterior abdominal wall."
pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (femalepelvicdiaphragm, malepelvicdiaphragm)
v
t
e
Muscles of the hip and human leg
Iliac region
Iliopsoas
psoas major/psoas minor
iliacus
Buttocks
Gluteal muscles
maximus
medius
minimus
tensor fasciae latae
lateral rotator group:
quadratus femoris
inferior gemellus
superior gemellus
internal obturator
external obturator
piriformis
Thigh / compartments
Anterior
sartorius
quadriceps
rectus femoris
vastus lateralis
vastus intermedius
vastus medialis
articularis genus
Posterior
hamstring
biceps femoris
semitendinosus
semimembranosus
Medial
pectineus
external obturator
gracilis
adductor
longus
brevis
magnus
minimus
Fascia
Femoral sheath
Femoral canal
Femoral ring
Adductor canal
Adductor hiatus
Muscular lacuna
fascia lata
Iliotibial tract
Lateral intermuscular septum of thigh
Medial intermuscular septum of thigh
Cribriform fascia
Leg/ compartments
Anterior
tibialis anterior
extensor hallucis longus
extensor digitorum longus
peroneus tertius
Posterior
superficial
triceps surae
gastrocnemius
soleus
accessory soleus
Achilles tendon
plantaris
deep
tarsal tunnel
flexor hallucis longus
flexor digitorum longus
tibialis posterior
popliteus
Lateral
peroneus muscles
longus
brevis
Fascia
Pes anserinus
Intermuscular septa
anterior
posterior
transverse
Foot
Dorsal
extensor hallucis brevis
extensor digitorum brevis
Plantar
1st layer
abductor hallucis
flexor digitorum brevis
abductor digiti minimi
2nd layer
quadratus plantae
lumbrical muscle
3rd layer
flexor hallucis brevis
adductor hallucis
flexor digiti minimi brevis
4th layer
dorsal interossei
plantar interossei
Fascia
Plantar fascia
retinacula
Peroneal
Inferior extensor
Superior extensor
Flexor
Authority control
TA98: A04.7.02.003
UpToDate Contents
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…Rickettsia rickettsii is the prototype. R. akari is transmitted to the common house mouse (Mus musculus) by the bloodsucking mite Liponyssoides sanguineus (formerly Allodermanyssus sanguineus). The mouse…
…lesser trochanter of the femur. The iliacus muscle joins the psoas to insert via the same tendon. The iliacus and psoas muscles are the main hip flexors. The psoas and iliacus are sometimes considered together…
…nerve (L2 to L4) runs through the psoas muscle and emerges at the lower border between the psoas and iliacus muscles, beneath the inguinal ligament lateral to the common femoral artery. The femoral nerve provides …
…lining for the abdominal and pelvic cavities and is continuous with the diaphragmatic fascia, the iliacus fascia, and the pelvic fascia The linea alba stretches from the xiphoid process to the pubic symphysis…
…and, in males, the spermatic cord and prostate. The obturator artery supplies the pelvic bone, iliacus muscle, and musculature of the medial thigh, including the adductors and the gracilis muscle. The…
English Journal
Swimmers With Low Back Pain Indicate Greater Lumber Extension During Dolphin Kick and Psoas Major Tightness.
Kitamura G, Tateuchi H, Ichihashi N.
Journal of sport rehabilitation. 2019 May;()1-28.
In competitive swimming, many swimmers experience lower back pain (LBP). Lumbar hyperextension may cause LBP and tight hip flexor muscle may cause lumbar extension during swimming. The purpose of this study was to clarify the features of the elastic moduli of the muscles and the lumbar extension whe
The effect of altered stride length on iliocapsularis and pericapsular muscles of the anterior hip: An electromyography investigation during asymptomatic gait.
Lawrenson P, Hodges P, Crossley K, Vicenzino B, McGorm M, Semciw A.
Gait & posture. 2019 Apr;71()26-31.
Anterior pericapsular muscles potentially contribute to active hip joint stability in walking by controlling anterior femoral translation in peak extension. Alternatively, these muscles could flex the hip and tension the anterior capsule to aid initiation of swing. Although never investigated, the l
Musculus iliacus und Musculus psoas major verlaufen in einer gemeinsamen Faszie (Musculus iliopsoas) unter dem Leistenband durch die Lacuna musculorum zum Oberschenkel. 3 Innervation Die Innervation des Musculus iliacus ...
Der M. iliacus entspringt von der Fossa iliaca (Darmbeinschaufel), die er fast komplett ausfüllt, und der Spina iliaca anterior inferior. Der gemeinsame Ansatz beider Muskeln ist der Trochanter minor am Femur (kleiner Rollhügel).
1 Definition Der Musculus iliopsoas gehört zur inneren Hüftmuskulatur und befindet sich im Retroperitonealraum. Er besteht aus dem Musculus psoas major, dem Musculus iliacus und in manchen Fällen aus dem Musculus psoas ...