The tongue is derived embryologically in a distinct manner Different blood

The tongue is derived embryologically in a distinct

This preview shows page 26 - 28 out of 39 pages.

The tongue is derived embryologically in a distinct manner Different blood supply and innervation Anterior ⅔ VS. posterior ⅓ V3 branches inside the mandible to the infratemporal fossa and enters the mandibular foramen Running through center of the mandible and continues all the way forward and gives off branches to the mandibular teeth Inferior alveolar nerve Mental nerve emerges from mental foramen and provides sensation to chin and lower lip It is the very end of inferior alveolar nerve of V3 Nerve block for teeth drilling If lower jaw, numb the nerve to lower teeth, which means a needle in the deep surface of oral cavity near the mandibular foramen Since 1 nerve, allows dental work on many lower teeth Chin and lower lip gets numb also- a byproduct of doing inferior alveolar nerve block Chorda tympani Cervical spinal nerves provide sensation to back of ear, back of scalp, and back of neck behind mandible Vertex-ear-chin line Everything anterior to that is trigeminal nerve Posterior to it is upper cervical nerves Shingles in trigeminal nerve CASE STUDY Chickenpox lives in trigeminal ganglion Occurs in one of the dermatomes of a trigeminal division branch V1 distribution, forehead, cornea, lateral part of nose Shingles that affect cornea Viral eruption on cornea blindness Cornea- part of V1 and lateral part of nose- part of V2 Since the upper teeth is innervated by individual branches of superior alveolar nerve Must do nerve block on individual teeth CASE STUDY of removing molar in African chief’s wife Cranial Nerve test
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CN 1: close one nostril and take a smell; alternate nostrils CN 2: cover up one eye, keep eyeglasses on and check Take glasses off pinhole correction Takes all light rays and makes them straight through the middle of lens where there is least amount of distortion Tells if optic nerve problem or refractive problem Visual field testing for retina Cover one eye and determine the field of vision Tells if optic nerve and retina are working CN 3: look at finger and follow doctor’s fingers without moving head Look at fingers out and in See if pupils constrict to determine autonomic function CN 4: Sympathetic Shine light in the eye and determine pupillary constriction CN 5: sensory in the face Check if same on both sides for V1, V2, V3 CN 6: Clench the teeth to determine muscles of mastication Cranial Nerve VII: has sensory and motor function MOTOR: Travel through facial canal and exit base of skull between the mastoid and styloid process → stylomastoid foramen Mastoid behind the ear The nerve then branches into temporal, zygomatic, buccal, mandibular, and cervical Innervates a lot of tiny fine motor muscles in face; ends in skin of facial muscles Allows facial expressions SENSORY: to the tongue; distributed to same region as lingual nerve, but that nerve contains general sensation
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  • Spring '08
  • Dr.Gross
  • phrenic nerve, lingual nerve, posterior abdominal wall, Posterior Mediastinum

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