What nerve innervates the posterior trunk muscles?

What nerve innervates the posterior trunk muscles?

Via the tibial nerve, the sciatic nerve innervates the muscles of the posterior leg, including the flexor hallucis longus, flexor digitorum longus, tibialis posterior, popliteus, gastrocnemius, soleus, and plantaris and the sole of the foot, including.

What are the muscles in the trunk?

There are five muscles that form the abdominal part of the anterior trunk. These are the rectus abdominis, pyramidalis, external abdominal oblique, internal abdominal oblique and transversus abdominis.

What is the innervation of rectus abdominis?

Innervation. The rectus abdominis muscle is innervated by the thoracoabdominal nerves, which enter the rectus sheath by piercing its anterior surface. They pass between the transversus abdominis and internal oblique muscle layers, and pierce the sheath of the rectus abdominis muscle.

What muscles are innervated by the posterior cord of the brachial plexus?

The posterior cord is a part of the brachial plexus….Posterior cord.

Name Roots Supplies
radial nerve C5-C8, T1 triceps brachii muscle, the brachioradialis muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis muscle), supinator, and the extensor and abductor muscles of the thumb

What Innervates sacral nerve?

The sacral plexus (plexus sacralis) is a nerve plexus that provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot, and part of the pelvis (see the following image). It is part of the larger lumbosacral plexus.

What is the general innervation to all of the abdominal muscles?

There are two pairs of muscles, each located immediately lateral to the linea alba. The majority of the anterior abdominal wall is formed by the rectus abdominis muscle….Origin and insertion.

Origin Pubic symphysis, Pubic crest
Innervation Intercostal nerves (T6-T11), Subcostal nerve (T12)

What muscles are involved in trunk flexion?

TRUNK FLEXION Any muscle with vertical or oblique fibers that connects the thorax with the pelvis assists in flexion of the trunk. The major actions involved are bilateral activity of the rectus abdominis, external and internal oblique, and psoas major.

What Innervates internal oblique?

The internal oblique is innervated by both the lower intercostal nerves as well as branches of the lumbar plexus (iliohypogastric nerve and ilioinguinal nerve).

What is the Pyramidalis muscle?

Pyramidalis is a small triangular muscle located anterior to the lower part of rectus abdominis muscle within the rectus sheath. It is attached by tendinous fibres to anterosuperior margin of pubis and by the ligamentous fibres in front of the pubic symphysis.

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