Study of sternalis muscle in north Indian population- a cadaveric study
Abstract
Background: Sternalis is anatomic variant of anterior thoracic region generally encountered on routine dissection, imaging procedures or surgeries. Although here is sufficient text available regarding presence and extent of sternalis muscle but state of confusion still exist regarding its nerve supply.
Aim: In our study we have tried to find out the incidence of presence of sternalis muscle in north Indian population and through fine dissection, we have focused on the innervation received by the muscle.
Materials and Method: 48 human cadavers including both male and female were dissected at Veer Chandra Singh Garhwali Government Institute of medical Science & Research, Paui- Garhwal and Sarojini naidu Medical College Agra. Special emphasis was laid on innervations and through fine dissection, detailed picture about innervations was recorded. For cases with doubt, histological examination was done and final observations were recorded.
Result: Sternalis muscle was reported in 4 out of 48 cadavers. All cases presented with unilateral type of sternalis muscle. Three were present in male while one in female cadaver. In one cadaver, it was innervated by medial pectoral nerve while in two, innervations were provided by intercostals group of nerves. Only one cadaver presented with dual nerve supply.
Conclusion: in north Indian region, incidence of sternalis is 8.3 percent with dual innervation in single cadaver.
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References
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