Muscles and their actions upper core Flashcards
1
Q
A
Rectus abdominus
- front of torso
- crosses lumbar and thoracis vertebrae
- bends torso forward (flexion)
- tilts pelvis backwards (posterior tilt)
- origin pubis
- insertion- cartilage of 5,6,7th ribs and base of sternum
- 3 strong bands in teh middle made of connective tissues are part of the ab aponeurosis. They run horizontally though to reinforce structure
- center is the linea alba (white line)
2
Q
rectus abdominus
A
- front of torso
- crosses lumbar and thoracis vertebrae
- bends torso forward (flexion)
- tilts pelvis backwards (posterior tilt)
- origin pubis
- insertion- cartilage of 5,6,7th ribs and base of sternum
- 3 strong bands in teh middle made of connective tissues are part of the ab aponeurosis. They run horizontally though to reinforce structure
- center is the linea alba (white line)
3
Q
A
External obliques
- sides of torso
- cross invertebral lumbar and thoracic vertebrae
- pulls torso to side (lateral flexion)
- turns torso (rotation)
- bends torso (forward flexion)
- origin lower 8 ribs
- insertion iliac crest via abdominal aponeurosis to linea alba
- most superficial of the 3 layers at the side
- diagonal sloping fibers pull in different directions
- active roll in wakling and running
4
Q
External Obliques
A
- sides of torso
- cross invertebral lumbar and thoracic vertebrae
- pulls torso to side (lateral flexion)
- turns torso (rotation)
- bends torso (forward flexion)
- origin lower 8 ribs
- insertion iliac crest via abdominal aponeurosis to linea alba
- most superficial of the 3 layers at the side
- diagonal sloping fibers pull in different directions
- active roll in wakling and running
5
Q
A
Internal Obliques
- sides of torso
- lumbar and thoracic vertebral joints
- rotation of torso
- bends torso forward flexion
- origin thoacolumbar fascia, iliac crest and inguinal ligament
- insert cartilage of lower 3 or 4 ribs and via abdominal aponeurosis to linea alba
- under external obliques
- fibers slope doqn and forward for a cross cross pattern to torso muscles
6
Q
Internal Obliques
A
- sides of torso
- lumbar and thoracic vertebral joints
- rotation of torso
- bends torso forward flexion
- origin thoacolumbar fascia, iliac crest and inguinal ligament
- insert cartilage of lower 3 or 4 ribs and via abdominal aponeurosis to linea alba
- under external obliques
- fibers slope doqn and forward for a cross cross pattern to torso muscles
7
Q
A
Transverse abdominus
- side of torso
- crosses lumbar intervertebral joints
- compresses abdominal contents
- origin- cartilage of lower 6 ribs, thoracolumbar fascia, iliac crest and inguinal ligament
- inserts via abdominal aponeuriosis to linea alba
- helps stabilize lumbar spine because it holds everything in
8
Q
Transverse abdominus
A
- side of torso
- crosses lumbar intervertebral joints
- compresses abdominal contents
- origin- cartilage of lower 6 ribs, thoracolumbar fascia, iliac crest and inguinal ligament
- inserts via abdominal aponeuriosis to linea alba
- helps stabilize lumbar spine because it holds everything i
9
Q
aponeurosis
A
broad fiberous sheet that convers ab area
-rectus ab is buried in it
10
Q
A
Erector Spinae
- on back, either side of vertebral column
- crosses invertebral joints
- extension of spine
- lateral flexion
- origin- sacrum and iliac crest, ribs
- inserts ribs, transverse process of vertebrae and cranium
- 3 groups
11
Q
Erector Spinae
A
- on back, either side of vertebral column
- crosses invertebral joints
- extension of spine
- lateral flexion
- origin- sacrum and iliac crest, ribs
- inserts ribs, transverse process of vertebrae and cranium
- 3 groups
12
Q
3 groups of erector spinae
A
iliocostalis, longissimus, spinalis
13
Q
Iliocostalis
A
cervsis, thoracis, lumbar
14
Q
longissimus
A
thoracis, cervicis
15
Q
A
Multifidus
- back, either side of vertebral column
- crosses all invertebral joints
- spine extension
- lateral flexion
- torso rotation
- origin sacrum and mamillary/transverse process
- insertion spinous process
16
Q
Multifidus
A
- back, either side of vertebral column
- crosses all invertebral joints
- spine extension
- lateral flexion
- torso rotation
- origin sacrum and mamillary/transverse process
- insertion spinous process
17
Q
A
Quadratus lumborum
- either side of vertebral column
- crosses lumbar intervertebral joints
- pulls torso to side (lateral flexion)
- origin iliac crest and iliolumbar ligament
- insertion tranvserse process of upper 4 lumbar and lower bit of 12th rib
- stabilize lumbar spine
18
Q
Quadratus lumborum
A
- either side of vertebral column
- crosses lumbar intervertebral joints
- pulls torso to side (lateral flexion)
- origin iliac crest and iliolumbar ligament
- insertion tranvserse process of upper 4 lumbar and lower bit of 12th rib
- stabilize lumbar spine
19
Q
A
Pelvic floor muscles
- support pelvic contents
- continence
- origin ischium, pubis
- insertion, sacrum and coccyx
- levator ani and coccygeus muscles
21
Q
A
Diaphragm
- internal at bottom of ribcage, separates thoracic from abdominal cavity
- increases volume of thoracic cavity during inspiration
- origin inner surface of lower ribs
- insertion central tendon
22
Q
A
Diaphragm
- internal at bottom of ribcage, separates thoracic from abdominal cavity
- increases volume of thoracic cavity during inspiration
- origin inner surface of lower ribs
- insertion central tendon
23
Q
A
External Intercostals
- between each of ribs
- lift ribs upwards increasing volume of thoracic cavity
- origin- inferior border of each rib
- insert superios border of rib above
- supplement action of diaphragm
24
Q
External Intercostals
A
- between each of ribs
- lift ribs upwards increasing volume of thoracic cavity
- origin- inferior border of each rib
- insert superios border of rib above
- supplement action of diaphragm
25
Q
A
Internal Intercostals
-between each of ribs
draws ribs down, decreasing volume during expiration
- origin-superior border of rib
- insertion- inferior border of rib above
