| MUSCLES |
NUMBER OF
MUSCLES |
BODY
LOCATION |
PAGE #
REF. IN GRAY'S ANATOMY |
ACTION |
| Sterno-Mastoid |
2 |
Neck |
319 |
Lifts thorax during forced inspiration if head is fixed |
| Scaleni |
6 |
Neck |
335 |
Elevate first and second ribs when they take fixed point from above during
forced inspiration |
| Trapezius |
2 |
Upper and back part of neck & shoulders |
355 |
Forced Inspiration |
| Rhomboideus
Major |
2 |
Between spine & shoulder blades |
355 |
Forced Inspiration |
| Rhomboideus
Minor |
2 |
Between spine & shoulder blades |
355 |
Forced Inspiration |
| Ilio-Costalis |
2 |
Parallel to the spine; outermost
on the back |
355 |
Aids forced inspiration by fixing last rib
|
| Latissimus
Dorsi |
2 |
Lower Back |
341 |
Raises lower ribs to assist forced inspiration
if the arms are fixed |
| Serratus Posticus
Supior |
2 |
Lower Back |
342 |
Elevates ribs in forced inspiration |
| Serratus Posticus
Inferior |
2 |
Lower Back |
342 |
Draws lower ribs downward and backward, and thus elongates the thorax (chest) |
| Pectoralis
Major |
2 |
Upper & Fore part of Chest |
381 |
When arms are
fixed, draws ribs upward during forced inspiration. |
| Pectoralis
Minor |
2 |
Upper & Fore part of Chest Beneath Pectoralis Major |
381 |
Aids Pectoralis Major
|
| Subclavis |
2 |
Between clavicle and first rib |
381 |
Works in conjunction with Pectoralis Major & Minor
|
| Levatores
Costarum |
24 |
Sides of Chest to front Of ribs |
355 |
Assist in raising the ribs during forced inspiration
|
| Triangularis Sterni |
2 |
Inner wall of front of chest |
355,356 |
Draws down ribs during forced expiration
|
| External
Intercostals |
22 |
Outside layer of Intercostals between the ribs |
354 |
Raise the ribs during forced inspiration
|
| Internal
Intercostals |
22 |
Inside Layer of intercostals between the ribs |
354,355,356 |
Depress and invert lower borders of ribs during forced
expiration. At fore part
of chest they assist external intercostals during forced inspiration. |
| *Diaphragm |
1 |
Separates chest cavity from abdominal cavity |
355 |
Increases vertical dimensions of the chest cavity during inspiration
by flattening when it contracts. It
is relaxed during expiration.
|
| Quadratus Lumborum |
2 |
Abdomen between pelvis & last rib |
355 |
Aids forced inspiration by fixing last rib
|
| Obliquus
Externus |
2 |
abdomen |
365 |
They compress the lower part of the chest during forced
expiration if the pelvis and spine are fixed.
|
| Obliquus
Internus |
2 |
abdomen |
365 |
'' |
| Transversalis |
2 |
abdomen |
365 |
'' |
| Pyramidalis |
2 |
abdomen |
365 |
'' |
| Rectus
Abdominus |
2 |
abdomen |
365 |
'' |
| Levator
Ani |
1 |
Forms floor of pelvis |
369 |
A muscle of forced expiration
|
