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These fibres decussate (cross) to the contralateral (opposite) side, so called the sensory decussation. The ascending bundle after the decussation is called the medial lemniscus . Unlike other ascending tracts of the brain, fibres of the medial lemniscus do not give off collateral branches as they travel along the brainstem .
In the brain, where nerve fibers obliquely cross from one lateral side of the brain to the other, that is to say they cross at a level other than their origin. See for examples decussation of pyramids and sensory decussation. In neuroanatomy, the term chiasma is reserved for crossing of- or within nerves such as in the optic chiasm.
The mandibular nerve (V 3) carries sensory information from the lower lip, the lower teeth and gums, the chin and jaw (except the angle of the jaw, which is supplied by C2-C3), parts of the external ear and parts of the meninges. The mandibular nerve carries touch-position and pain-temperature sensations from the mouth.
The nerves exit the pterygopalatine fossa through the pterygomaxillary fissure.They pass within or upon the posterior wall of the maxilla. [1]: 496 They descend on the tuberosity of the maxilla and give off several twigs to the gums and neighboring parts of the mucous membrane of the cheek.
The facial nerve, also known as the seventh cranial nerve, cranial nerve VII, or simply CN VII, is a cranial nerve that emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.
If you wake up with sore teeth or tight jaw muscles, you might be grinding your teeth at night. Here, dentists and oral pain experts share tips to stop bruxism. Dentist reveals 1 easy exercise you ...
[1] [2] [3] The plexus issues dental branches [2] [1] and gingival branches; [2] the small dental branches provide sensory innervation to the lower/mandibular teeth. [ 1 ] Note that the lower premolar, canine and incisor teeth as well as their associated gingiva are innervated by the incisive branch of the inferior alveolar nerve (which may or ...
Two of the cranial nerves show chiasmas: (1) the chiasma of the optic tract (i.e., cranial nerve II), which originates from the eyes and inserts on the optic tectum of the midbrain; and (2) the trochlear nerve (i.e., cranial nerve IV), which originates in the ventral midbrain and innervates one of the six muscles that rotate the eye (i.e., the ...