Pronator Quadratus
Original Editor - Kakshya Rupakheti
Top Contributors - Kakshya Rupakheti and Amanda Ager
Description[edit | edit source]
Pronator Quadratus is a deep-seated,short, flat quadrilateral muscle with parallel running fibres.[2] Muscle has a mean length of 6 cm and mean width of 3.5 cm, the pronator quadratus muscle is confined in a small closed compartment, delimited by the distal side of the interosseous membrane dorsally and by its own fascia on the volar surface.[3]The muscle has been neglected to a great extend in the anatomical and functional literature.The study confirms,that the muscle consist of two head different head- Superficial head which is prime mover in forearm pronation, and the deep head which is dynamic stabilizer of radioulnar joint.[4]
Origin[edit | edit source]
Muscle arises from the oblique ridge on the anterior surface of the distal fourth of the Ulna.[2]
Insertion[edit | edit source]
Muscle is inserted in lateral border and anterior surface of the distal fourth of the radius.[2]
Nerve[edit | edit source]
Anterior interosseous nerve, a branch of the median nerve (C8-T1).[3]
Artery[edit | edit source]
It is vascularized by the anterior interosseous artery.[3]
Function[edit | edit source]
Clinical Uses[edit | edit source]
Pronator Quadratus is the key muscle used in the electrophysiologic diagnosis of AIN lesions.[2]
Spasticity[edit | edit source]
The injection of neurolytic agents such as Botulinum toxin, phenol or alcohol is used into the motor point of the pronator Quadratus for the management of pronator spasticity in stroke patients.[2]
Palpation[edit | edit source]
Pronator Quadratus is the deepest muscle in the forearm that can be neither palpated nor observed.[2]
Treatment[edit | edit source]
Stretching[edit | edit source]
Strengthening[edit | edit source]
References[edit | edit source]
- ↑ https://learnmuscles.com/glossary/pronator-quadratus/
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Choung PW, Kim MY, Im HS, Kim KH, Rhyu IJ, Park BK, Kim DH. Anatomic characteristics of pronator quadratus muscle: a cadaver study. Annals of rehabilitation medicine. 2016 Jun;40(3):496.
- ↑ 3.0 3.1 3.2 Créteur V, Madani A, Brasseur JL. Pronator quadratus imaging. Diagnostic and Interventional Imaging. 2012 Jan 1;93(1):22-9.
- ↑ Stuart PR. Pronator quadratus revisited. Journal of Hand Surgery. 1996 Dec;21(6):714-22.
- ↑ Pronator Quadratus stretch
- ↑ Pronator Quadratus Strengthening
