Martin Gruber Anastomosis
Original Editor - Nehal Shah
Top Contributors - Nehal Shah and Ewa Jaraczewska
Introduction[edit | edit source]
Anomalous means deviated from normal / routine. Anomalous innervations are routinely a normal occurrence. But if these are not recognised, they may be mistaken for technical pitfall or an actual pathology which may not be present [1] Nerve communication between the median and ulnar nerves in the forearm, is known as Martin-Gruber anastomosis. This implies that nerve fascicles from Median nerve transfers to Ulnar nerve[2]
The prevalence of Martin Gruber Anastomosis (MGA) is between 3.3 to 40% of population [1]with a prevalence of 11.6 % in Indian population [3]Median to Ulnar nerve communication was first described by Martin in 1763 [4]who proposed the possibility of such a communication. This finding was finally confirmed after 100 years by Gruber in in 1870 [5]
Normal Innervation Pattern of Hand[edit | edit source]
| Median Nerve | Ulnar Nerve |
|---|---|
| Abductor Pollicis Brevis | Abductor Digiti Minimi |
| Opponens Pollicis Brevis | Flexor Digiti Minimi |
| Flexor Pollicis Brevis | Opponens Digiti Minimi |
| 1st and 2nd Lumbrical | 3rd and 4th Lumbrical |
| Dorsal and Palmar Interossei | |
| Deep Head of Flexor Pollices Brevis | |
| Adductor Pollices |
Studies suggest that this standard pattern is seen in 33% of cases[6]
Sub Heading 3[edit | edit source]
Resources[edit | edit source]
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References[edit | edit source]
- ↑ 1.0 1.1 Aziz Saba EK. Electrophysiological study of Martin—Gruber anastomosis in a sample of Egyptians. Egyptian Rheumatology and Rehabilitation. 2017 Oct;44:153-8.
- ↑ Cavalheiro CS, Razuk Filho M, Pedro G, Caetano MF, Vieira LA, Caetano EB. Clinical repercussions of Martin-Gruber anastomosis: anatomical study. Revista Brasileira de Ortopedia. 2016 Mar;51:214-23.
- ↑ Kaur N, Singla RK, Kullar JS. Martin–Gruber Anastomosis-A cadaveric study in north indian population. Journal of Clinical and Diagnostic Research: JCDR. 2016 Feb;10(2):AC09.
- ↑ Martin R. Tal om nervers allmänna egenskaper i människans kropp.
- ↑ Gruber W. Ueber die verbindung des nervus medianus mit dem nervus ulnaris am unterarme des menshen und der saugethiere. Arch Anat Phisiol. 1870;37:501.
- ↑ Rowntree T. Anomalous innervation of the hand muscles. The Journal of Bone and Joint Surgery. British volume. 1949 Nov;31(4):505-10.
