| 词条 | Iliacus muscle | ||
| 释义 |
| Name = Iliacus muscle | Latin = musculus iliacus | Image = Iliacus muscle06.png | Caption = Position of iliacus muscle (shown in red.) | Image2 = Anterior Hip Muscles 2.PNG | Caption2 = The iliacus and nearby muscles | Origin = upper two-third of the iliac fossa | Insertion = base of the lesser trochanter of femur | Action = flexes and {{cns|rotates medially thigh|date=April 2018}} | Antagonist = Gluteus maximus | Blood = medial femoral circumflex artery, iliac branch of iliolumbar artery | Nerve = femoral nerve | pronunciation = {{IPAc-en|ᵻ|ˈ|l|aɪ|.|ə|k|ə|s|}} }} 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. StructureThe 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 supplyThe iliopsoas is innervated by the femoral nerve and direct branches from the lumbar plexus.[2] FunctionIn 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 imagesNotes1. ^1 Platzer (2004), p 234 2. ^Thieme Atlas of Anatomy (2006), p 422 References
| first = Werner | last = Platzer | title = Color Atlas of Human Anatomy, Vol. 1: Locomotor System | publisher = Thieme | isbn = 3-13-533305-1 | year = 2004 | edition = 5th }}
| title = Thieme Atlas of Anatomy: General Anatomy and Musculoskeletal System | publisher = Thieme | year = 2006 | isbn = 1-58890-419-9 }} External links{{Commons category|Iliacus muscles}}
4 : Hip flexors|Hip muscles|Iliopsoas muscles|Muscles of the lower limb |
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