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The costochondral joints are the joints between the ribs and costal cartilage in the front of the rib cage. They are hyaline cartilaginous joints (i.e. synchondrosis or primary cartilagenous joint). Each rib has a depression shaped like a cup that the costal cartilage articulates with. There is normally no movement at these joints.
Costochondritis is a common condition that is responsible for approximately 13–36% of acute chest pain-related concerns from adults depending on the setting, with 14–39% for adolescents. [8] It is most often seen in individuals who are older than 40 years of age and occurs more often in women than in men. [3]
Synapses are essential for the transmission of neuronal impulses from one neuron to the next, [9] playing a key role in enabling rapid and direct communication by creating circuits. In addition, a synapse serves as a junction where both the transmission and processing of information occur, making it a vital means of communication between ...
Embryonic vertebrate subdivisions of the developing human brain hindbrain or rhombencephalon is a developmental categorization of portions of the central nervous system in vertebrates. It includes the medulla , pons , and cerebellum .
The adult human brain is estimated to contain from 10 14 to 5 × 10 14 (100–500 trillion) synapses. [1] Every cubic millimeter of cerebral cortex contains roughly a billion (short scale, i.e. 10 9) of them. [2] The number of synapses in the human cerebral cortex has separately been estimated at 0.15 quadrillion (150 trillion) [3]
The corpus callosum allows for communication between the two hemispheres and is found only in placental mammals. The anterior commissure serves as the primary mode of interhemispheric communication in marsupials , [ 9 ] [ 10 ] and which carries all the commissural fibers arising from the neocortex (also known as the neopallium), whereas in ...
The auditory dorsal stream in both humans and non-human primates is responsible for sound localization, and is accordingly known as the auditory 'where' pathway. In humans, this pathway (especially in the left hemisphere) is also responsible for speech production, speech repetition, lip-reading, and phonological working memory and long-term memory.
The cerebral cortex, also known as the cerebral mantle, [1] is the outer layer of neural tissue of the cerebrum of the brain in humans and other mammals.It is the largest site of neural integration in the central nervous system, [2] and plays a key role in attention, perception, awareness, thought, memory, language, and consciousness.