| Cats with
hyperthyroidism, examined at The Animal Medical Center, have manifested
signs of neuromuscular and central nervous system (CNS) dysfunction similar,
in many respects, to signs described in human beings with the disorder.
Weakness attributable to muscle dysfunction was relatively common in cats
with hyperthyroidism, with neck venttroflexion being the most easily recognizable.
Cats also have exhibited decreased ability to jump and have shown fatigue
after physical activity. Other neuromuscular signs included muscle tremors,
nonspecific gait disturbances, and collapse. Behavioral changes that have
developed in hyperthyroid cats included restlessness, hyperexcitability,
irritability, and aggression. Some cats aimlessly wandered, paced, and
circled, which may reflect a state of confusion, anxiety, and nervousness.
Rarely, hyperthyroid cats developed focal or generalized seizures. With
correction of hyperthyroidism, most, if not all, neuromuscular and CNS
signs resolved. |