rectus abdominis muscle

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rec·tus ab·dom·i·nis mus·cle

(rek'tŭs ab-dom'i-nis mŭs'ĕl)
Muscle of ventral abdominal wall, flanking the linea alba, characterized by tendinous intersections separating its length into multiple bellies; origin, crest and symphysis of the pubis; insertion, xiphoid process and fifth to seventh costal cartilages; action, flexes lumbar vertebral column, draws thorax downward toward pubis; nerve supply, thoracoabdominal nerves.
Synonym(s): musculus rectus abdominis [TA] , rectus muscle of abdomen.

rectus abdominis muscle

Abdominal wall muscle. Origin: crest and symphysis of pubis. Insertion: xiphoid process, costal cartilages 5-7. Nerve: spinal T7-T12. Action: tenses abdomen, flexes vertebral column.
See also: muscle


[L.] straight.

rectus abdominis muscle
see Table 13.2.
ocular rectus muscle
see Table 13.1F.
rectus sheath
the sleeve of fascia which surrounds the rectus abdominis muscle and which is derived from the aponeurotic tendons of the other abdominal muscles.
References in periodicals archive ?
However, the improvement in the activation ratio of transversus abdominus and internal oblique relative to rectus abdominus muscle was found in the subjects that were treated with core stabilization exercise.
They occur through Hasselbach's triangle, which is anatomically demarcated by the inguinal ligament inferiorly, by the inferior epigastric vessels laterally, and by the rectus abdominus muscle medially (Figure 5).
The ultrasound images (Figures 1 and 2) demonstrate a spindle-shaped soft tissue mass of low central echogenicity, located at the medial margin of the left rectus abdominus muscle.
Mothers benefit from manual therapy to help visceral organs sit properly in the abdomen, diastasis recti or split rectus abdominus muscle return to a more stable and esthetically pleasing position, positioning of the pelvis, improve mobility in the spine, and to stretch tight tissues without sacrificing much needed stability.
This injury often presents bilaterally as a result of chronic shearing at the pubic symphysis from repetitive adductor muscle activity, leading to micro-tears of the rectus abdominus muscle or its tendon at the pubic insertions.
The CT also demonstrated diffuse metastatic disease (right rectus abdominus muscle, pancreas and brain), which were new since his last surveillance CT.
Some of the more common presentations of musculoskeletal pelvic pain are hyperirritability in the rectus abdominus muscle, the overlying fascia, or the subcutaneous tissue of the lower abdomen overlying the external oblique muscle.
When series 1 and 2 were repeated with conscious core muscle use, there was a significant increase in rectus abdominus muscle activity.
EMG analysis- For this exercise, the predominant muscle activity was for rectus abdominus muscles and the obliques.
For the record: While sit-ups will help to strengthen the rectus abdominus muscles (the abs), they will nothing to reduce the amount of fat on your tummy.
N Allowing the stomach to tense up or your upper abdominals to bulge outwards, as this means the larger rectus abdominus muscles aka six pack are being used, instead of the lower trunk muscles.