Neuro L8

Question 1

Tongue protrusion muscle

Answer 1

Genioglossus muscle

Question 2

Hypoglossal lower motor neuron lesion

symptoms

Answer 2

Tongue deviation toward lesion
Fasciculations (one of first signs)
Atrophy

Question 3

Corticobulbar lesion (UMN)
Symptoms

Answer 3

Tongue deviation away from lesion
No fasciculations
Minimal atrophy

Question 4

Hypoglossal laterality

Answer 4

Decussation near hypoglossal nucleus

Question 5

Accessory nerve lesion

Answer 5

paralyzed trapezius

Question 6

IX

Solitary nucleus

Answer 6

Taste posterior 1/3

Carotid body and sinus

Question 7

IX Somatic afferent
Function
Ganglion
Nucleus

Answer 7

Skin of ear and middle ear
Superior ganglion
Spinal V nucleus

Question 8

IX Visceral afferent
Function
Ganglion
Nucleus

Answer 8

Carotid body: blood O2, CO2, pH
Carotid sinus: detects changes in BP
Inferior ganglion
Solitary nucleus

Question 9

IX Special Visceral Efferent
Nucleus
Muscle

Answer 9

Nucleus ambiguus

Stylopharyngeus muscle

Question 10

IX General Visceral Efferent
Nucleus
Ganglion
Area

Answer 10

Inferior salivatory nucleus
Otic ganglion
Parotid salivary gland

Question 11

Glossopharyngeal Neuralgia

Answer 11

Sudden pain at posterior tongue, radiates to ear

Similar to trigeminal neuralgia

Question 12

X somatic Afferent
Area
Ganglion
Nucleus

Answer 12

Skin of ear
Superior ganglion of X
Trigeminal nucleus

Question 13

X Visceral Afferent
Area
Ganglion
Nucleus

Answer 13

Thoracic abdominal viscera
Aortic arch baroreceptors, chemoreceptors
Inferior ganglion of X
Solitary nucleus of X

Question 14

X Efferent

Answer 14

Nucleus ambiguus (lateral): muscles of speech and swalling

Nucleus ambiguus (medial): heart and lungs

Dorsal motor nucleus: all visceral up to transverse colon

Question 15

Gag reflex
Afferent
Efferent

Answer 15

Afferent: CNIX
Efferent: CNX

Question 16

Tongue thrust reflex
Afferent
Efferent

Answer 16

Afferent: CNV or CNIX
Efferent: CN XII