Phrenic Nerves Flashcards
what is the anterior nerve root
anterior rami C3,C4,C5
what is it motor function
innverates the diapghram
what is its sensory function
to innervate the central part of the diaphragm, the pericardium and the mediastinal part of the partial plerua
where does the phrenic nerve originate
cervical spinal root C3 , C4 + C5
What does spinal root C4 provide
the main contribution
what does C3 + C5 provide
lesser contribution
what are some communicating fibres
cervical plexus
where does the nerve arise
lateral border of the anterior scalene muscle
what does it pass inferiorly over
anterior surface of the anterior scalene
what is it deep to
prevertbeal layer of the cervical fascia
what does it run posterior to
subcliavian vein
what does the right phrenic nerve pass over
the lateral part of the right subclavian artery
how does the right phrenic enter the thorax
via the superior thoracic aperture
what does the right phrenic nerve descend anteriorly along
right lung root
what does the right phrenic come associated with
what does it cross
associates with the pericardium and runs along the right atrium
where does the right phrenic nerve peicer the diaphragm
at the inferior vena cava opening
what does the right phrenic nerve innervate
inferior surface of the diapghram
what does the left phrenic nerve pass anteriorly over
medial part of the left subclavian artery
what does the left phrenic nerve enter the thorax via
superior thoracic aperture
what does the left phrenic nerve descend anterior to
left lung root
what does the left phrenic nerve cross and bypasses
the vagus nerve (posterior to the phrenic)
what does the left phrenic nerve associate with and go over
associates with the pericardium and goes over the left atrium and ventricle
what does the left phrenic nerve perice
the inferior surface of the diapghram
what does the left phrenic nerve innervate
inferior surface of the diapghram
