which of the following statements regarding nerve plexuses are false? group of answer choices enlargements in the cervical and thoracic spinal cord allow these areas to participate in plexus formation. the sciatic nerve is the largest nerve in the body. damage to the brachial plexus causes respiratory arrest. paralysis of the adductor muscles and loss of sensation over the medial aspect of the thigh indicates injury to the obturator nerve. wrist drop and winged scapula are conditions that may result from injuries to nerves emerging from the brachial plexus.