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Ebook High – Yield neuroanatomy (5/E): Part 2

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Nội dung chi tiết: Ebook High – Yield neuroanatomy (5/E): Part 2

Ebook High – Yield neuroanatomy (5/E): Part 2

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2 appropriate nuclei.2Describe the divisions of the trigeminal nerve, including the fiber types in each division and their targets.3Diagram the ascendi

ng trigeminothalamic pathways, including the constituent primary, secondary, and tertiary neurons. List all cranial nerves that utilize these pathways Ebook High – Yield neuroanatomy (5/E): Part 2

.I Introduction. The trigeminal system provides sensory innervation to the face, oral cavity, and supratentorial dura through general somatic afferent

Ebook High – Yield neuroanatomy (5/E): Part 2

(GSA) fibers. It also innervates the muscles of mastication, tensors tympani and palati, anterior belly of digastric and mylohyoid through special vi

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2ophthalmic nerve (cranial nerve CN VO lies in the lateral wall of the cavernous sinus. Il enters the orbit through the superior orbital fissure and in

nervates the forehead, dorsum of the nose, upper eyelid, orbit (cornea and conjunctiva), and cranial dura. The ophthalmic nerve mediates the afferent Ebook High – Yield neuroanatomy (5/E): Part 2

limb of the corneal reflex.B.The maxillary nerve (CN v2) lies in the lateral wall of the cavernous sinus and innervates the upper lip and cheek, lower

Ebook High – Yield neuroanatomy (5/E): Part 2

eyelid, anterior portion of the temple, oral mucosa of the upper mouth, nose, pharynx, gums, teeth and palate of the upper jaw, and cranial dura. Il

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2nervates the lower lip and chin, posterior portion of the temple, external auditory meatus, and tympanic membrane, external ear, teeth of the lower ja

w, oral mucosa of the cheeks and floor of the mouth, anterior two-thirds of the longue, temporomandibular joint, and cranial dura. The motor (SVE) com Ebook High – Yield neuroanatomy (5/E): Part 2

ponent of CN V accompanies the mandibular nerve (CN V,) through the foramen ovale. It innervates the muscles of mastication, mylohyoid, anterior belly

Ebook High – Yield neuroanatomy (5/E): Part 2

of the digastric, and tensors tympam and palati (Figure 10-1).8788 Chapter 10UMN4th ventricleCN V motorPonsLateral pterygoidCondyloid processFigure 1

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2rostral pons, 8ilateral innervation of the LPMs results in protrusion of the mandible in the midline. The LPMs also depress the mandible. Denervation

of one LPM results in deviation of the mandible to the ipsilateral or weak side The trigeminal motor nucleus receives bilateral corticonuclear input C Ebook High – Yield neuroanatomy (5/E): Part 2

N, cranial nerve: LMN, lower motor neuron; UMN, upper motor neuron.MotorSuperior cerebellarChief sensory nucleusMotor nucleus CN VMedial lemniscusCort

Ebook High – Yield neuroanatomy (5/E): Part 2

icospinal tractIll Trigeminothalamic Pathways (Figure 10-2)A.The anterior trigeminothalamic tract mediates pain and temperature sensation from the fac

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2 trigeminal nerve and synapse with second-order neurons in the spinal nucleus of trigeminal nerve.2Second-order neurons are located in the spinal trig

eminal nucleus. They give rise to decussating axons that terminate in the contralateral ventral posteromedial (VPM) nucleus of the thalamus.3Third-ord Ebook High – Yield neuroanatomy (5/E): Part 2

er neurons are located in the VPM nucleus of the thalamus. They project through the posterior limb of the internal capsule to the face area of the som

Ebook High – Yield neuroanatomy (5/E): Part 2

atosensory cortex (Brodmann areas 3, I, and 2).B.The posterior trigeminothalamic tract mediates tactile discrimination and pressure sensation from the

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

Ebook High – Yield neuroanatomy (5/E): Part 2ucleus (of thalamus)Facial area of postcentral gyrusInternal capsule (posterior limb)

CHAPTER 10Trigeminal SystemObjectives1List the central and peripheral components of the trigeminal system, including the location and function of the

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