vnu 7s 414 Chapter heen The Brain and Cranial Nerve Exercise 15.10 Testing Speci

Question

vnu 7s 414 Chapter heen The Brain and Cranial Nerve Exercise 15.10 Testing Specific Functions of the Cranial Nerves Some anawrs may be used morn an nce blindness -2 corneal reflex is 8btem tannverab accessory lpinal accessory 3 diculty tuming the eye interior and later -s. to naimin balance and equlibrium inabity to smet ,a soft palate droopa en one side a mweni trochlear 11, tongue deviates to one side when it is suck out of the mouth k vius -12 weakness n eenton othe scapula 6. Three of the welve eranial nerves carry sonatic motor Sters to extrinaic mucles of the eye Complete the table by listing the nerves that carry somatic motor fbers to the extrinsic aye muscles, and then nane the musclels innervaned by each nerve 17. Seversl eranial nerves inante seructures of the tongut Canplete the table by linting the nerves thar innervate sructures of the tongue, and then lst the functions of each nerve. Tongue Structures Inservated by the Nerve

Explanation / Answer

15)1.h,2. C and i ,3. a ,4. J , 5.l ,6.c ,7. G ,8.d ,9.h and f,10. D and k ,11. E,12.b

16).TROCHLEAR NERVE-supplies superior oblique muscle

ABDUCENT NERVE-supplies lateral rectus

OCCULOMOTOR NERVE-supplies superior, inferior and medial rectii; inferior oblique and part of locator palpebrae superioris

17)NERVE SUPPLY OF TONGUE..

MOTOR NERVES

1.Superior longitudinal ,inferior longitudinal,transverse,vertical,genioglossus,hyoglossus,styloglossus are supplied by hypoglossal nerve(this nerve is tested clinically by asking patient to protrude his tongue. Normally tongue is protruded straight forward..if paralysed, the tongue deviates to paralysed side).

2.palatoglossus is supplied by cranial root of the accessory nerve through the pharyngeal plexus

SENSORY NERVE

1.lingual nerve- nerve of general sensation

2.chordatympani -nerve of taste for anterior two-thirds of tongue except vallate papillae

3.glossopharyngeal nerve-nerve for both general sensation and taste for the posterior one third of the tongue including circumvallate papillae

4.vagus nerve-posteriormost part of the tongue

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