Bronchial Filament of Left Recurrent Laryngeal Nerve
Pars bronchialis nervus laryngei recurrentis sinistrae
Read moreQuick Facts
Origin: Left recurrent laryngeal nerve.
Course: From the left recurrent laryngeal nerve to the left primary bronchus and the left pulmonary plexus.
Branches: No named branches.
Supply: Parasympathetic efferent and autonomic afferent innervation of the left lung.
Related parts of the anatomy
Origin
The bronchial filament of the left recurrent laryngeal nerve is a branch of the left recurrent laryngeal nerve.
Course
The bronchial filament of the left recurrent laryngeal nerve emerges from the left recurrent laryngeal nerve as it wraps underneath the aortic arch. From here it descends either anterior or posterior to the left pulmonary artery to reach the left posterior pulmonary plexus.
Branches
There are no named branches of the bronchial filament of the left recurrent laryngeal nerve.
Supplied Structures & Function
The parasympathetic efferent innervation to the left lung allows for contraction of bronchial smooth muscle and increased mucus secretion in airways. Autonomic afferent innervation relays sensory feedback relating to pain, irritants, and stretch.
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Laryngeal Nerve
The nonrecurrent laryngeal nerve is a rare (<1%) anatomic variation of the recurrent laryngeal nerve where the nerve enters the larynx off of the vagus nerve without descending into the thorax.
