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Macrocephaly is a condition in which circumference of the human head is abnormally large. [1] It may be pathological or harmless, and can be a familial genetic characteristic. . People diagnosed with macrocephaly will receive further medical tests to determine whether the syndrome is accompanied by particular disorde
The basilar artery is the main blood supply to the brainstem and connects to the Circle of Willis to potentially supply the rest of the brain if there is compromise to one of the carotids. At each cervical level, the vertebral artery sends branches to the surrounding musculature via the anterior spinal arteries.
The medulla oblongata or simply medulla is a long stem-like structure which makes up the lower part of the brainstem. [1] It is anterior and partially inferior to the cerebellum . It is a cone-shaped neuronal mass responsible for autonomic (involuntary) functions, ranging from vomiting to sneezing . [ 2 ]
Bullseye returns in Toy Story 3 as one of the remaining toys in Andy's room and has a small role in Toy Story 4. Bullseye reappears in the short films Hawaiian Vacation, Small Fry, and Partysaurus Rex. At Disney California Adventure, Jessie and her critter friends star in a carousel ride called Jessie's Critter Carousel.
The main supply of blood to the brainstem is provided by the basilar arteries and the vertebral arteries. [14]: 740 It is important to note that there is a bit of variability in how these arteries connect and supply blood to the brain, such as where the arteries fuse or are reinforced. The variability that exists allows for syndromes to be ...
Active transport is used to move most substances between the blood vessels and the osteocytes. [1] Haversian canals are contained within osteons, which are typically arranged along the long axis of the bone in parallel to the surface. The canals and the surrounding lamellae (8-15) form the functional unit, called a Haversian system, or osteon.
Louis Ulbach's story "Le Prince Bonifacio" (1860) features scenes about a disembodied brain. [18] [19] In Dick Donovan's story "Some Experiments with a Head" (1889), the head of a guillotined man is reanimated by electricity. [20] In Carl Grunert's story "Mr. Vivacius Style" (1908), the severed head of a journalist is revived in a laboratory. [21]
The metaphysis (pl.: metaphyses) is the neck portion of a long bone between the epiphysis and the diaphysis. [1] It contains the growth plate, the part of the bone that grows during childhood, and as it grows it ossifies near the diaphysis and the epiphyses.