Author Archives: priyeshbanerjeept

Omohyoid muscle

In this article we will discuss about Omohyoid muscle. So let’s get started.

Omohyoid muscle

It originates from the upper border of the scapula and superior transverse scapular ligament and gets inserted into the lower border of hyoid bone lateral to the sternohyoid muscle. It is innervated by the ansa cervicalis (C1-C3) and artery supply is through the inferior thyroid artery. It’s chief action is depression of hyoid bone and larynx. It also helps in terminal phase of swallowing.

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Stylohyoid muscle

In this article we will discuss about Stylohyoid muscle. So let’s get started.

Stylohyoid muscle

Part of suprahyoid muscle. It originates from the posterior and lateral surface of the styloid process of temporal bone and gets inserted into the hyoid bone at greater cornu superior to omohyoid muscle. It is innervated by the facial nerve and artery supply is through the branches of facial, occipital and lingual artery. It’s chief action is elevation of hyoid bone facilitating swallowing.

Pic courtesy:- http://www.teachmeanatomy.com
Pic courtesy:- http://www.common.wikimedia.org

Scalene anterior muscle

In this article we will discuss about Scalenus anterior muscle. So let’s get started.

Scalenus anterior muscle

It originated from the anterior tubercle of transverse processes of third, fourth, fifth and sixth cervical vertebrae and gets inserted into scalene tubercle of first rib and upper surface of second rib anterior to subclavian groove. It is innervated by the anterior ramus of C5-C6 and artery supply is through the ascending cervical artery. It’s chief action is elevation of first and ipsilateral flexion of neck. Clinically hypertonic scalene anterior muscle causes compression of brachial plexus and subclavian artery leading to scalenus anterior syndrome.

Yunis-Varon Syndrome

In this article we will discuss about Yunis-Varon syndrome. So let’s get started.

Yunis-Varon syndrome

Discovered by Colombian genetist Emilio Yunis is an extremely rare autosomal recessive genetic disorder which affects musculoskeletal, cardiorespiratory system and ectodermal tissue. Characterized by growth retardation before and after birth, partial or complete absence of shoulder blades, abnormalities of digits, may also include cardiac defects, difficulty respiration and feeding problems. Inheritance is of autosomal recessive manner. Less than 15 cases reported since 1980. Many of the infants with this disease did not survive beyond one year of age.

Pictorial representation of a child with Yunis-Varon syndrome

Pic courtesy- http://www.sciencedirect.com

Psoas major muscle

In this article we will discuss about Psoas major muscle. So let’s get started.

Psoas major muscle

It is divided into two part; superficial part arises from the lateral surface of T12, L1-L4 and neighbouring intervertebral discs and deep part originates from the transverse process of L1-L5 and gets inserted into the lesser trochanter of femur along with iliacus, thereby forming iliopsoas. It is innervated by the lumbar plexus, L1-L3 and artery supply is through the lumbar branch of iliolumbar artery. It’s chief action is flexion of hip along with that it also causes lateral rotation and adduction of hip and unilateral contraction bends the trunk laterally while bilateral contraction raises the trunk from supine position. Clinically, Psoas syndrome is a very rare condition occurs when psoas muscle gets injured causing lower back pain. It is often misdiagnosed. Athletes are more prone to this disease. Physiotherapy is treatment of choice for psoas syndrome.

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