THORAX ABDOMEN AND PELVIS

MEDICAL

THORACIC WALL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During cadaveric dissection, the graduate student m examine an intercostal muscle near the lateral margin of the sternum in the 6th intercostal space.Which of the following muscle most likely the graduate has identified?
A
External intercostal muscle
B
Internal intercostal muscle
C
Intercostalis intimus muscle
D
sternocostalis muscle
Explanation: 

Detailed explanation-1: -When you inhale: the intercostal muscles contract, pulling the ribcage upwards and outwards. the diaphragm contracts, pulling downwards. volume of the thorax increases and the pressure inside decreases.

Detailed explanation-2: -[Conclusion] Human intercostal muscle thickness can be measured with ultrasound and increases only in the anterior portions during maximal breathing.

Detailed explanation-3: -Intercostal muscles are muscles that present within the rib cage. Consist of three layers of muscles external, internal, and innermost layer they combine to fill the space between the ribs.

There is 1 question to complete.