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[1] [2] The dentate gyrus is part of the trisynaptic circuit, a neural circuit of the hippocampus, thought to contribute to the formation of new episodic memories, [3] [4] the spontaneous exploration of novel environments [4] and other functions. [5] The dentate gyrus has toothlike projections from which it is named. [6]
The names of these teeth are: (1) Incisors, there are eight incisors located in the front of the mouth (four on the top and four on the bottom). They have sharp, chisel-shaped crowns that cut food. (2) Cuspids (or canine tooth), the four cuspids are next to each incisor. Cuspids have a pointed edge to tear food.
The pterygomandibular space is one of the possible spaces into which a tooth may be displaced into during dental extraction, e.g. of a maxillary wisdom tooth. [5] A mandibular fracture in the angle region may also be the cause of a pterygomandibular space infection. [1]
The MNTN is located in the brainstem, more specifically (sources vary) spanning the length of the midbrain [2] /in the caudal midbrain and rostral pons. [1] It is situated (sources vary) near [ 1 ] /within [ 2 ] the periaqueductal gray , lateral to the cerebral aqueduct .
The dentate forms the largest pathway between the cerebellum and the remainder of the brain. [1] It is the largest and most lateral of the four pairs of deep cerebellar nuclei , the others being the globose and emboliform nuclei, which together are referred to as the interposed nucleus , and the fastigial nucleus.
The anatomic crown of a tooth is the area covered in enamel above the cementoenamel junction (CEJ) or "neck" of the tooth. [2] [3] Most of the crown is composed of dentin ("dentine" in British English) with the pulp chamber inside. [4] The crown is within bone before eruption. [5] After eruption, it is almost always visible.
The mental foramen is located on the anterior surface of the mandible. It is directly below the commisure of the lips, and the tendon of depressor labii inferioris muscle. [1] It is at the end of the mandibular canal, which begins at the mandibular foramen on the posterior surface of the mandible.
It is widely accepted that there is a factor within the tissues of the first branchial arch that is necessary for the development of teeth. [2] The tooth bud (sometimes called the tooth germ) is an aggregation of cells that eventually forms a tooth and is organized into three parts: the enamel organ, the dental papilla and the dental follicle. [3]