The external intercostal muscles or external intercostals (intercostales externi) are eleven in number on both sides. The muscles extend from the tubercles...

The intercostal muscles comprise many different groups of muscles that run between the ribs, and help form and move the chest wall. The intercostal muscles...

The internal intercostal muscles (intercostales interni) are a group of skeletal muscles located between the ribs. They are eleven in number on either...

and, to a lesser extent, the intercostal muscles drive respiration during quiet breathing. The elasticity of these muscles is crucial to the health of...

reference to the muscles of the thoracic wall, the intercostal nerves and vessels run posterior to the internal intercostal muscles: therefore, they are...

with courses of spinal nerves shown Intercostal nerve block External intercostal muscles Internal intercostal muscles Peripheral nervous system This article...

Unlike the other two intercostal muscles, the external intercostal muscle does not retain its muscular character all the way to the sternum, and so the...

abdominal external oblique muscle (also external oblique muscle or exterior oblique) is the largest and outermost of the three flat abdominal muscles of the...

intimi. They supply the intercostal muscles and, by branches which perforate the intercostales externi, the pectoral muscles and the mamma. There are...

respiratory muscles is highly regular and stable, with rhythmic bursts of activity during inspiration only to the diaphragm and external intercostal muscles. The...

forced exhalation) involves the internal intercostal muscles used in conjunction with the abdominal muscles, which act as an antagonist paired with the...

erector spinae muscles. Deep to these muscles are the osseous portions of the 6th and 7th ribs and the internal and external intercostal muscles. The triangle...

a constant breathing rhythm by stimulating the diaphragm and external intercostal muscles to contract, resulting in inspiration. In the medulla, the ventral...

isolate and relax the muscles controlling the vocal folds, so that they are unimpaired by tension. The external intercostal muscles are used only to enlarge...

Muscles of thorax Pectoralis major Pectoralis minor Subclavius Serratus anterior Levatores costarum External intercostal muscle Internal intercostal muscle...

skeletal muscles. Different sources group muscles differently, regarding physical features as different parts of a single muscle or as several muscles. There...

The elevation of the chest caused by the contraction of the external intercostal muscles also contributes to the increased volume of the thorax. The volume...

the chest. It is in the same layer as the subcostal muscles and the innermost intercostal muscles. It arises on either side from the lower third of the...

tetrapods, the rib cage intrinsically holds the muscles of respiration (diaphragm, intercostal muscles, etc.) that are crucial for active inhalation and...

Other muscles that can be involved in inhalation include: External intercostal muscles Scalene muscles Sternocleidomastoid muscle Trapezius muscle Hyperinflation...

inhalation occurs, the contraction of the diaphragm and the external intercostal muscles (along with the bucket/pump handle movements of the ribs and...

Diaphragm (innervated by phrenic nerve) and external intercostal muscles (innervated by segmental intercostal nerves) contract, creating a negative pressure...

lower six intercostal arteries as well. The muscles are innervated by thoraco-abdominal nerves, these are continuations of the T7-T11 intercostal nerves...

males, the cremaster muscle is also attached to the internal oblique. The internal oblique is supplied by the lower intercostal nerves, as well as the...

axillary lymph nodes and subscapularis muscle. It anastomoses with the internal thoracic artery, subscapular, and intercostal arteries, and with the pectoral...

posterior intercostal membranes are aponeuroses located between the ribs and are continuations of the external and internal intercostal muscles, respectively...

is the inhalation by lateral expansion of the ribs, using the external intercostal muscle to lift the costals to enlarge the thorax. Moreover, the shoulders...

extends the vertebral column. Erector spinae muscles Longissimus muscles Semispinalis muscles Spinalis muscle This article incorporates text in the public...

medulla), sends nervous impulses to the external intercostal muscles and the diaphragm, via the intercostal nerve and the phrenic nerve, respectively...

pelvis by the diaphragmaticus muscle (analogous of the diaphragm in mammals). During inhalation, the external intercostal muscles expand the ribs, allowing...