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Question 1

what are the motor nerves of the skull

Answer 1

III n. oculomotoricus
IV n. trochlearis
VI n. abducens
XII n. hypoglossus

TAHO

only motor fibers which supply the muscles of the head

Question 2

III - oculomotorius origin

Answer 2

superficial origin medially on midbrain - ventrally

• nucl. motorius n. oculomotrii -> somato-motor
• nucl. accessorius -> viscero-motor(PS)

leave the skull at fissura orbitalis, and then divide into dorsal and ventral ramus

Question 3

r. dorsalis III

Answer 3

motor -> m. rectus dorsalis, m. levator palpebra superior

Question 4

r. ventralis III

Answer 4

motor and PS
- motor: r. rectus ,edialis, m. rectus ventralis, m. obliqus ventrale
PS: ggl. cilare, m. ciliaris and m. sphincter pupilla

Question 5

origin of IV

Answer 5

n. trochlearis - velum medullare rostrale -> tentorium cerebelli to floor of cranial cavity
nucl. n. trochlearis -> somato-motor (tegmentrum mesencephali)

sulcus n. opthalmicus -> fissura orbitalis

motor to m. obliqus dorsalis, only motor nerve to emerge friom dorsal aspect of brain!

Question 6

VI n. abducens origin, nuclei, exit, target

Answer 6

o: fibers from MO close to midline

Nucl: nucl. n. abducens -> somato-motor(tegmentum mesencaphalis)

exit: sulcus n. optjhalmici: fissura orbitalis

motor nerve: m. rectus lat and m. retractor bulbi

Question 7

XII - n. hypoglossus origin, nuclei, exit, target

Answer 7

O: ventral on MO (sulcus n. hypoglossi)
Nucl: nucl. n. hypoglossi -> somatomotor
skull: canalis n. hypoglossi crosses vagu group and then go towards tongue
motor: r. lingualis: to intrinsic and extrinsic mm of the tongue