Fig. 1
From: A case of stiff dog syndrome associated with anti-glutamic acid decarboxylase antibodies
a Sagittal T2-weighted MR image revealing caudal occipital malformation, kinking of the caudal medulla, foramen magnum herniation (arrow), and a T2-hyperintense intramedullary signal within the spinal cord extending from C1 to C3. Transverse FLAIR image at the level of C2 (broken arrow, inset), demonstrating the hypointense syrinomyelic cavity in the dorsal spinal cord. b Lordotic posture resulting from axial muscular rigidity. Superimposed muscle spasms cause partial flexion of the limb joints, including the digits (arrow). c Resting EMG revealing continuous motor unit activity in the lumbar epaxial musculature