The muscles have no tone and no movement during sleep paralysis. Sleep paralysis occurs when falling asleep or when waking up. Vivid terror or stress dreams are associated with sleep paralysis. If the paralysis episodes recur then see a sleep specialist for evaluation. In brief: Sleep paralysis.
Lacrimal sac. The lacrimal sac or lachrymal sac[1] is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. It connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity.
Lacrimal Sac (Dacryocystitis) Go to Academy Store Learn more and Purchase. Inflammation of the lacrimal sac (acute dacryocystitis) has various causes. However, in most cases the common factor is complete NLD obstruction that prevents normal drainage from the lacrimal sac into the nose. Chronic tear retention and stasis lead to secondary infection. Clinical findings include edema and erythema with distension of the lacrimal sac below the medial canthal tendon (Fig 13-12).