Thoracic + Anterolateral Abdominal Walls Flashcards
External Intercostal- O, I, A, IN
O- Inf border of rib above
I- Sup border of rib below
A- Elevate ribs during forced inspiration (accessory inspiration)
IN- Intercostal nerve
Internal Intercostal- O, I, A, IN
O- Sup border of rib
I- Inf border of rib above
A- Innerosseus part- depresses rib
- Interchodral part (most med + ant)- elevates ribs
In- Intercostal nerve
Innermost intercostal- O, I, A, IN
occupies lateral most part of the intercostal space
O- Sup border of rib below
I- Inf border of rib
A- Depresses ribs during forced expiration
IN- Intercostal nerve
Subcostal- O, I, A, IN
O- Sup border of 2nd and 3rd rib below
I- Internal surface of lower ribs near costal angle
A- Depresses ribs during forced exporation
IN- intercostal nerve
Transversus thoracis- O, I, A, IN
O- Post surface of lower sternum
I- Internal surface of costal cartilages 6th to 2nd
A- Depresses rib (weak)
IN- Intercostal nerve
Diaphram sternal part O, I
O- Post surface of xiphoid process
I- Central tendon
Diaphram costal part O, I
O- Internal surface of lower 6 costal cartilages and their adjoining ribs
I- Central tendon
Diaphram lumbar part O, I
O- Lat arcuate lig, medial arcuarate lig, R+L crura, median arcurate lig
I- Central Tendon
at what levels does the openings for inf vena cava, esophagus
IVD T8- Caval oppening
VB T10- Esophageal hiatus
VB T12- Aortic hiatus
Action and Innervation of diaphram
A- Chief inspiratory muscle
IN- Phrenic Nerve (APRS C3,4,5)
External Oblique- O, I, A (bilateral and Unilateral), IN
O- ext surfaces of 5th to 12th ribs
I- Linea alba, pubic tubercle, ant 1/2 of iliac crest, flat apponerosis
A-
Bi- flexes trunk, stabalizes and controls tilt of pelvis (antilordorsis)
Uni- combo of flex and rot of trunk so ipsilateral shoulder moves ant
IN- Thoracoabdominal nerves (APR T7-11) and subcostal nerve (t12)
Internal Oblique- O, I, A (bi and Uni), In
O- thoracolumbar fascia, ant 2/3 iliac crest, lat 1/3 of inguinal lig
I- Inf border of 10th rib- 12th, linea alba, pectin pubis
A-
Bi- flexes trunk, stabalizes and controls pelvic tilt (antilordosis)
Uni- combo of flex and rot of trunk in such a way that contralateral shoulder moves ant
IN- Thoracoabdominal nerves, subcostal nerve and L1 spinal nerve
Transversus Abdominis
O- Internal surfaces of 7-12 costal cartilagesm throacolumbar fascia, iliac crest, lat 1/3 of inguinal lig
I- linea alba, pubic crest, pectin pubis
A- compresses abdominal organs (inreases intraabdominal pressure)
IN- Thoracoabdominial nerve, subcostal nerve
Pyramidialis
O- Pubic crest
I- linea alba
A- Tenses linea alba
IN- subcostal nerve
rectus abdominus
O- Pubic symphisis, pubic crest
I- Xiphoid process, 5-7 costal cartilages
Thoracoabdominal (t6-11, subcostal)
