Body Wall Muscles

Question 0

Subvertebral muscle (deep/below)

Answer 0

Two masses of muscle that span from the pelvic region to the base of the skull.
-Right next to the spine

Question 1

Ventral muscle (front)

Answer 1

Two straps of muscle that begin on the pubis and end on the chin.

Question 2

What are the 4 lateral layers of the muscle?

Answer 2

1. ) Outer most muscle layer
2. ) External muscle layer (second outer)
3. ) Middle muscle layer
4. ) Internal muscle layer

Question 3

Ventral muscle - hyoid group

Answer 3

Attaches to hyoid muscle.
Muscle that runs vertically towards the chin and sit anterior to the trachea and larynx.
(Swallowing and speaking)

Question 4

Lateral muscles- 4 layers

Answer 4

Scalenes:
S:
-there are 3 anterior, middle and posterior 
-lateral support for neck
-connects to first to ribs
-common to entrap biracial plexus
F:
-cervical flexion (bilateral)
-lateral flexion
-forced breathing

Question 5

Subvertebral muscle

Answer 5

Longus colli:
S:
-Deep to carotid and vagus nerve

F:
-cervical flexion

Question 6

Thoracic body wall

Answer 6

Ventral muscle: sternalis [rectus sternalis] muscle
Only in 8% of the population
S: Vertical muscle F: assist with rib movement

Lateral: Intercostal S: in between ribs/ In chest/ fibers change.
F: involved in breathing/ keeps space between ribs during breathing.

Diaphragm: S: heart&lungs superior/ separates thorax and abdomen
F: quiet breathing

Subvertebral: Longus colli- F: flexes neck

Question 7

Abdominal body wall

Answer 7

Ventral: Rectus abdominis: S: straight muscle ribs to pubis linea alba (dens irr tis spreads from L to R 6 pack) F: flexion of lumbar spine

Lat: external oblique: runs between ribs and linea alba. Attaches to 8 lowest ribs. F: rotation of trunk/ weak lumbar flexion/ supports abdomen organs

Internal obliques: S: middle of abdomen wall
F: rotation with external , supports abdomen organs

Transversus abdominis: S: weakest muscle of group and deepest.
F: compress the abdominal organs ( keeps everything in place).
Quadratus lumborum (lumbar): S: anterior to Multifidus / attaches to anterior transverse process/ attaches to 12th rib tp, lumbar iliac crest/ posterior to KI/ "ONLY AB MUSCLE THAT DOENT ATTACH TO LINEA ALBA"
F: lat flex (uni)/ exten lumbar spine 

SUB: psoas major: S: ant of lum vert/ ant to QL’s/passes under ingunial ligament/ Att to femur (LEG).
F: powerful hip flexors and week in lateral rotation of hip.
Exaggerates the Lumbar curve - maintaining posture.