Morphological variant of pronator quadratus muscle : a case report
Presented herein is a case of one different morphological anomaly of pronator quadratus (PQ) muscle. Here, the shape of PQ was not similar to the normal morphology of the muscle. The PQ muscle appeared to be in distinct triangular-shaped instead of quadrangular-shaped. In addition, this triangul...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Pusat Perubatan Universiti Kebangsaan Malaysia
2018
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| Online Access: | http://journalarticle.ukm.my/20617/ http://journalarticle.ukm.my/20617/1/16_ms0192_pdf_40035.pdf |
| Summary: | Presented herein is a case of one different morphological anomaly of pronator
quadratus (PQ) muscle. Here, the shape of PQ was not similar to the normal
morphology of the muscle. The PQ muscle appeared to be in distinct triangular-shaped instead of quadrangular-shaped. In addition, this triangular-shaped was
found in two sites i.e. proximal and distal. Significantly, the PQ muscle consisted of
two fleshy red fibres and white aponeurosis. Proximally placed portion had a wide
base and a narrower apex. The larger base was attached to the ulna and formed
of fleshy red fibres which converged laterally to be continuous with aponeurosis
ending on the radius. In contrast, the distal triangular portion had the fleshy fibres
attached to the radius and converged medially to be continuous with aponeurotic
portions on the ulna. Each portion were referred as pronator triangularis proximalis
and pronator triangularis distalis. These variations might affect atypically in cases
of forearm pronation. Information of these variations is important in hand surgeries
and provide an additional knowledge on the relationship between morphology of
PQ muscle and the limitation or the strength in the action of it. |
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