A wearable medical device system having an external, necklace-shaped antenna that is sized and configured for placement about the neck of a subject, and having an implantable device with an implanted antenna that communicates with the external antenna to permit the transfer of energy and data between external and implantable components. The wearable medical device includes a control module that communicates with the implanted device via the external antenna. The implantable device includes an electrode configured to provide stimulation to a nerve.
