Arthritis and muscle rigidity/fever/rhabdomyolysis, and muscle weakness.

Rigidity: Muscle stiffness and resistance to movement

Rigidity – Muscle stiffness & resistance to movement

Muscle rigidity is also known as muscle tension, rigor, or stiffness.

Hypotension, constipation, dry mouth, muscle rigidity

Muscle rigidity and stiffness following administration of anesthesia

Convulsion (muscle stiffness and involuntary contractions)

Muscle Rigidity (which may also involve the thoracic muscles)

Muscle rigidity (which may also involve the thoracic muscles)

Muscle rigidity (which may also involve the thoracic muscles)

Also observed were muscle rigidity/fever/rhabdomyolysis and muscle weakness.

Also observed were arthritis and muscle rigidity/fever/rhabdomyolysis, and muscle weakness.

Muscle and abdominal rigidity are classic signs of a venomous black widow bite.

Rigidity – Muscle stiffness that hinders movement

Muscle rigidity and abdominal rigidity are classic signs of black widow envenomation.