In this article we will discuss about Rhomboid major muscle. So let’s get started.
It originates from the spinous processes of T2-T5 vertebrae and supraspinous ligament and gets inserted into the medial border of scapula inferior to the rhomboid minor. It is innervated by the dorsal scapular nerve and the artery supply is through the dorsal scapular artery. It’s chief action is retraction of scapula. Clinically high intensity injury to rhomboid major muscle leads to scapular instability.
In this article we will discuss about Levator scapulae muscle. So let’s get started.
It originates from the posterior tubercle of transverse processes of C1-C4 vertebrae and gets inserted into the medial border of scapula. It is innervated by the cervical nerve and dorsal scapular nerve and artery supply is through the dorsal scapular artery. It’s chief action is elevation of scapula. Clinically inflammation of levator scapulae leads to “Levator Scapulae Syndrome”.
In this article we will discuss about Teres minor muscle. So let’s get started.
Teres minor muscle
It originates from the upper 2/3rd of the dorsal surface of axillary or lateral border of scapula and gets inserted into the inferior facet of the greater tubercle of humerus. It is innervated by axillary nerve and artery supply is through the posterior circumflex humeral artery and circumflex scapular artery. It’s chief action is lateral rotation of arm. Clinically it is a part of rotator cuff musculature and atrophy of teres minor is often a consequence of a rotator cuff tear.
In this article we will discuss about Kuru disease. So let’s get started.
Kuru disease is a transmissible spongiform encephalopathy, a very rare neurodegenerative disease that was commonly found in Fore people of Papua New Guinea. It is caused due to presence of abnormally folded proteins called prion protein. It is transmitted among the Fore tribe of Papua New Guinea via funerary cannibalism which is a practice of eating body parts of deceased family members. Since women and children usually eats the brain tissue the prevalence of this disease is more in them. It is characterized by laughing sickness, progressive cerebellar ataxia or loss of co-ordination and uncontrollable muscle movements. It has following stages viz preclinical stage, clinical stage, ambulant stage, sedentary stage and terminal stage. There are 2700 cases reported between 1954-2004. Prognosis is usually fatal.
In this article we will discuss about Latissimus dorsi muscle. So let’s get started.
Lattisimus dorsi muscle
It originates from the spinous process of T7-L5 vertebrae, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula and inserts into the floor of intertubercular sulcus of humerus. It’s artery supply is through the subscapular artery and is innervated through the thoracodorsal nerve. It’s chief action is adduction, extension and internal rotation at shoulder joint. Clinically latissimus dorsi muscle is used as a source of muscle for breast reconstruction. Stiffness or tight latissimus dorsi leads to chronic shoulder pain and is also used in cardiomyoplasty.
In this article we will discuss about Flexor carpi ulnaris muscle. So let’s get started.
Flexor carpi ulnaris
It’s humeral head originates from the medial epicondyle of humerus and ulnar head originates from the medial margin of the olecranon process of ulna and gets inserted into the pisiform bone, hook of hamate by pisohamate ligament and base of fifth metacarpal by pisometacarpal ligament. It is innervated by ulnar nerve and recieves artery supply through the ulnar artery. It’s chief action is flexion and adduction of hand at wrist. Clinically entrapment of ulnar nerve by the aponeurosis of two heads of flexor carpi ulnaris leads to “cubital tunnel syndrome”.
In this article we will discuss about Flexor digitorum profundus muscle. So let’s get started.
Flexor digitorum profundus
It originates from the proximal 3/4th of the anterior and medial surface of ulna, interrosseus membrane and deep fascia of forearm and gets inserted into the base of distal phalanges of medial four digits. It is innervated by anterior interrosseus nerve and muscular branches of ulnar nerve. It’s artery supply is through the anterior interrosseus artery. It’s chief action is Flexion of wrist, metacarpophalangeal and interphalangeal joints. Clinically avulsion injury of flexor digitorum profundus muscle causes “Jersey finger”.
In this article we will discuss about Brachial artery. So let’s get started.
It originates at the lower border of the teres major muscle as a continuation of axillary artery and ends at cubital fossa in the level of the neck of radius it is then gets divided into radial and ulnar arteries. It gives rise to following branches
Profunda brachii artery
Superior ulnar collateral artery
Inferior ulnar collateral artery
Clinically it is palpable on the anterior aspect of elbow and is used to measure the blood pressure.
Injury to brachial artery as a consequence of humeral fracture leads to Volkmann Ischemic Contracture.
Relation to surrounding structures
Anteriorly- Medial cutaneous nerve of forearm, median nerve and bicipital aponeurosis.
Posteriorly- Medial and long head of triceps and brachialis muscles.
Medically- Ulnar nerve, basilic vein and median nerve.
Laterally- Median nerve, coracobrachialis muscle and biceps brachii muscle.