In this article, we will discuss about the Extensor pollicis brevis muscle. So, let’s get started.
Extensor pollicis brevis muscle
It originates from the interosseous membrane, and lower 1/3rd of the posterior part of the radius and gets inserted into the posterior surface of base of the proximal phalanx of the thumb. It is innervated by the posterior interosseous nerve (branch of the radial nerve) and artery supply is through the posterior interosseus artery. Its chief action is extension of the thumb at the metacarpophalangeal joint, abduction of carpometacarpal joint, and assists in radial deviation.
In this article, we will discuss about Myofascial trigger points. So, let’s get started.
Myofascial trigger points
Myofascial trigger points are discrete, focal, hyperirritable or hypersensitive soft tissue areas/spots (taut like band) that are felt like palpable nodules. They produce pain locally or in a referred pattern often acompanied by chronic musculokeletal disorders. Repetitive stress, acute trauma or microtrauma often leads to developoment of myofascial trigger points. Symptoms includes persistent pain (localized or referred), tenderness of the affected region, and decreased range of motion of the affected muscle. On palpation the trigger points are felt harder than normal consistency, nodular, and occasionally tender. Management includes Spray and Stretch technique, Trigger point pressure release technique, Myofascial release therapy, and Trigger point injection such as dry needling are some of the effective treatment modalities for trigger point pain relief.
Diiferent types of trigger points
Primary and Secondary/Central and Satellite trigger points
Primary or Central trigger points are local trigger points which when palpated produces pain. Specific characteristics includes that they are well-established, high intensity pain zone, and are present at or in the vicinity of neuromuscular junction.
Secondary or Satellite trigger points are present in the neighbouring areas of the central trigger points within the referred pain zone.
Active and Latent trigger points
Active trigger points can be applied to both central and satellite trigger points, they are tender to palpation and elicits a referred pain pattern. Pain can limit range of motion
Latent trigger points are not painful and do not elicits any referred pain. Although their presence leads to increased muscle tension/tighteness and stiffness. Force palpation or stimulation such force muscular activity or trauma or acute injury can re-activate an inactive trigger point.
We will further differentiate between active and latent trigger points as stated below