from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various straight muscles, as of the abdomen, eye, neck, and thigh.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several straight muscles in various parts of the body, as of the abdomen, thigh, eye etc.
from the GNU version of the Collaborative International Dictionary of English
- n. A straight muscle.
from The Century Dictionary and Cyclopedia
- n. In anatomy, one of several muscles so called from the straightness of their course, either in their own axis or in the axis of the body or part where they lie.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of various straight muscles
Thus, if the internal rectus is shortened, the eye turns in; if the external rectus, the eye turns out, producing what is known as "wall eye."
It means originally straight just as our Saxon word right and the Latin word rectus denote, in their symbol, a straight line; that being nature’s type of moral rightness, or rectitude.
Contributing Factors: The abdominal diastasis is simply a separation of the right and left sides of the front abdominal muscles rectus abdominus from their central attachment.
Progress to more advanced abdominal exercises after the gap has narrowed to the width of one or two fingers and when your abdominals can keep your rectus muscles closely aligned without your support.1
Before you begin doing any abdominal muscle exercise other than transverse abdominal contractions and pelvic tilts see pages 96-97, check your rectus abdominis muscles for separation.
The rectus muscles will tense, letting you detect any gap.
This exercise helps close a separation of the rectus muscles while toning your abdominals and flattening your stomach.
Aim: To help close a separation of your rectus muscles while toning your abdominals and flattening your stomach.
This type of training engages and increases the activation of the core muscles consisting of pelvic floor muscles, transversus abdominis, multifidus, internal and external obliques, rectus abdominis, erector spinae (sacrospinalis) especially the longissimus thoracis, and the diaphragm.
Keep in mind that your abdominals (abdominal wall, trans versus abdominus, rectus abdominus) and internal and external oblique take part in protecting your back from injuries.