Origin of Medial and Lateral Pectoral Nerves from the Supraclavicular Part of Brachial Plexus and its Clinical Importance – A Case Report

Shetty, Prakashchandra; Nayak, Satheesha B.; Kumar, Naveen; Thachathodiyl, Rajesh; D’Souza, Melanie Rose

doi:10.7860/jcdr/2014/7082.4029

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…In our study, well-developed lateral pectoral nerves were observed independently of the PM variation, even in the case of a significantly reduced clavicular portion. Thus, although the pectoral nerves are characterized by high anatomical variability according to their origin and course [51, 52], their territory seems to be constant. Such observations coincide with information provided by Bergman et al [2] who noted the occurrence of the lateral pectoral nerve even with congenital PM deficiency.…”

Section: Discussionmentioning

confidence: 99%

Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance

Haładaj

Wysiadecki

Clarke

et al. 2019

BioMed Research International

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Background. The presented study attempts to classify individual anatomical variants of the pectoralis major muscle (PM), including rare and unusual findings. Rare cases of muscular anomalies involving the PM or its tendon have been presented. An attempt has also been made to determine whether anatomical variations of the PM may affect the innervation pattern of the lateral and medial pectoral nerves. Material and Methods. The research was carried out on 40 cadavers of both sexes (22 males, 18 females), owing to which 80 PM specimens were examined. Results. Typical PM structure was observed in 63.75% of specimens. The most frequently observed variation was a separate clavicular portion of the PM. In one female cadaver (2.5% of specimens) the hypotrophy of the clavicular portion of the PM was noticed. In two male cadavers (5% of specimens) the fusion between the clavicular portion of the PM and the deltoid muscle was observed. In one of those cadavers, small sub-branches of the lateral pectoral nerve bilaterally joined the clavicular portion of the deltoid muscle. The detailed intramuscular distribution of certain nerve sub-branches was visualized by Sihler’s stain. PM is mainly innervated by the lateral pectoral nerve. In all specimens stained by Sihler’s technique, the contribution of the intercostal nerves in PM innervation was confirmed. Conclusions. Surgeons should be aware of anatomic variations of the PM both in planning and in conducting surgeries of the pectoral region.

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Section: Discussionmentioning

confidence: 99%

Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance

Haładaj

Wysiadecki

Clarke

et al. 2019

BioMed Research International

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“…The brachial plexus is one of the five spinal plexuses, which is responsible for the motor and sensory and sympathetic supply for the upper limbs [16]. In its origin, the brachial plexus is a somatic nerve plexus that arises from C5 to C8 nerve roots, then forms trunks, divisions, cords, and branches [5].…”

Section: Discussionmentioning

confidence: 99%

The Rare Five Finger Pectoralis Nerves: A Case Report

Fakoya¹,

Rosado-Velazquez²,

Sugunathevan³

et al. 2020

Open Access Maced J Med Sci

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The brachial plexus is a complex network of nerve tissue in the human body that has been reported to vary from person to person. We describe a very rare variation of the brachial plexus found on a routine cadaveric dissection. On the left side of the chest, we identified two lateral pectoral nerves arising from the lateral cord and innervating the pectoralis major muscle; two medial pectoral nerves (MPNs) arising from the medial cord that innervates both pectoral muscles and a communicating branch that connects the lateral and MPN. In addition, this communicating branch had a nerve that innervated the pectoralis minor muscle. Knowing the variations of branching of the pectoral nerves is critical when performing any medical procedure in the pectoral region, such as plastic breast reconstruction surgery after modified radical mastectomy in breast cancer, removal of the pectoral muscles, anesthetizing the brachial plexus, or axillary dissection.

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Lateral pectoral nerve

Luijkx¹,

Ariyasinghe²

2015

Radiopaedia.org

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Origin of Medial and Lateral Pectoral Nerves from the Supraclavicular Part of Brachial Plexus and its Clinical Importance – A Case Report

Cited by 6 publications

References 9 publications

Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance

Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance

The Rare Five Finger Pectoralis Nerves: A Case Report

Lateral pectoral nerve

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