Oblique And Rectus Muscles

Front 1

two groups

Back 1

oblique (slanted)
rectus (parallel or pependicular to axis)
both found in cervical, thoracic, and abdominal regions
function: support vertebral column, provide resistance against erector spinae mm, move ribs during respiration, make up abdominal wall
also increase intra-abdominal pressure during urination, defecation, and childbirth

Front 2

oblique mm of neckerratus posterior (scalene group)

Back 2

anterior, middle, and posterior scalene mm
each originates on transverse process of a cervical vertebra and inserts on a first or second rib
flex neck and when neck is stationary- elevate ribs during inspiratielevates ribson

Front 3

oblique mm of thoracic region

Back 3

internal and external intercostals and transverus thoracis m

Front 4

superior serratus posterior m

Back 4

elevates ribs

Front 5

inferior serratus posterior m

Back 5

pulls rib inferiorly and opposes diaphgram

Front 6

transversus abdominis m

Back 6

located deep to internal oblique m, originates on lower ribs and iliac crest and linea alba and pubis
contracts with other abdominal mm to compress the abdomen

Front 7

Rectus mm

Back 7

found in cervical, thoracic, and abdominal regions of the body
diaphgram
rectus abdominis m

Front 8

diaphgram (rectus)

Back 8

sheet of m that forms thoracic floor and separates thoracic cavity from abdominopelvic cavity
contracts when air is inhaled into lungs

Front 9

rectus abdominis m

Back 9

vertical m along midline of abdomen between pubic symphysis and xiphoid process of sternum
divided by linea alba
6 pack abs

Front 10

external oblique m

Back 10

flare laterally as they are traced from bottom to top

Front 11

internal oblique m

Back 11

directed medially