Cervical Plexus

Click on the images below for a high resolution version.

Ultrasound transducer position to image the ansa cervicalis and phrenic nerve transverse view

Ultrasound image of the ansa cervicalis and phrenic nerve transverse view

Ultrasound image of the labeled ansa cervicalis and phrenic nerve transverse view

Key:
SCM - Sternocleidomastoid Muscle
PhN - Phrenic Nerve
ASM - Anterior Scalene Muscle
IJV - Internal Jugular vein
CA - Carotid Artery