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Opisthotonus or opisthotonos (from Ancient Greek: ὄπισθεν, romanized: opisthen, lit. 'behind' and τόνος , tonos , 'tension') is a state of severe hyperextension and spasticity in which an individual's head, neck and spinal column enter into a complete "bridging" or "arching" position.
The most obvious signs for the veterinarians are neurological, especially lateral deviation of the neck and head, opisthotonus or emprosthotonus. Other signs comprises compulsive movements of the lips, facial and masticatory muscles, with food staying in mouth.
Faux and Padian suggested in 2007 that the live animal was suffering opisthotonus during its death throes, and that the pose is not the result of any post-mortem process at all. They also reject the idea of water as responsible for randomly arranging the bodies in a "death pose", as different parts of the body and the limbs can be in different ...
The most common domestic animal to be affected is the dog, either through accidental ingestion or intentional poisoning. The onset of symptoms is 10 to 120 minutes after ingestion. [26] Symptoms include seizures, a "sawhorse" stance, and opisthotonus (rigid extension of all four limbs). Death is usually secondary to respiratory paralysis.
Back muscle spasms often cause arching, called opisthotonus. Sometimes, the spasms affect muscles utilized during inhalation and exhalation, which can lead to breathing problems. [10] Prolonged muscular action causes sudden, powerful, and painful contractions of muscle groups, called tetany. These episodes can cause fractures and muscle tears.
Oculogyric crisis and opisthotonus are also very common. Acute effects of dopamine antagonists also include Parkinsons-like symptoms, manifested by bradykinesia, pin rolling tremor, and rigidity of the body. These movements may fluctuate over hours and temporarily dissipate in response to reassurance, and the individual episodes may last ...
Strychnine (/ ˈ s t r ɪ k n iː n,-n ɪ n /, STRIK-neen, -nin, US chiefly /-n aɪ n /-nyne) [6] [7] is a highly toxic, colorless, bitter, crystalline alkaloid used as a pesticide, particularly for killing small vertebrates such as birds and rodents.
Dog anatomy comprises the anatomical study of the visible parts of the body of a domestic dog. Details of structures vary tremendously from breed to breed, more than in any other animal species, wild or domesticated, [ 1 ] as dogs are highly variable in height and weight.