Download Pontine nucleus

Brainstem
Non-cranial nerve nuclei
Nucleus
Site
Gracile nucleus
Medulla (underneath gracile tubercle)
Cuneate nucleus
Medulla (underneath cuneate tubercle)
Infeiro olivary nucleus
Medulla
Pontine nucleus
pons
inferior colliculus
Midbrain
superior colliculus
Midbrain
Red nucleus
Midbrain
Substantia nigra
Midbrain
Pretectal area
Midbrain
Non-cranial nerve nuclei in medulla oblongata
Gracile nucleus
Cuneate nucleus
Internal arcuate fiber
Decussation of medial lemniscus
Inferior olivary nucleus
Non-cranial nerve nuclei in pons
Pontine nucleus
Non-cranial nerve nuclei in midbrain
Nucleus of inferior colliculus
superior colliculus
Red nucleus
Substantia nigra
Degeneration of the substantia nigra can result in
Parkinson’s disease
Pretectal area
The junction of midbrain and diencephalon
The efferent fibers project to the bilateral accessory
nucleus of oculomotor nerve, involving both direct and
indirect light reflex of eye.
White matter
Ascending tracts
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Medial lemniscus
Spinal lemniscus
Trigeminal lemniscus
Lateral lemniscus
Medial lemniscus
Ventral
posterolateral
nucleus
Conduct the
proprioceptive and
fine touch of the
contralateral trunk
and limbs
Spinothalamic lemniscus (tract)
Transfers the pain,
temperature and
rough touchpressure
sensation of the
contralateral trunk
and limbs
Ventral posteromedial
Trigeminal lemniscus
nucleus of thalamus
(trigeminothalamic tract)
Trigeminal ganglia
Conduct the pain, temperature and touchpressure sensation from the skin,teeth and
mucous membrane of contralateral head and face
Lateral lemniscus
From bilatral cochlear
nuclei and superior
olivary nuclei
Terminated to the nucleus
of inferior colliculus or
the medial genticulate
body
Conducts the auditory
sensation of both ears
Descending tracts
• Pyramid tract:
Corticospinal tract (to spinal cord)
Corticobulbar tract (to brainstem)
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Rubrospinal tract
Tectospinal tract
Vestibulospinal tract
Reticulospinal tract
Corticospinal tract
Corticobulbar tract
Innervate bilateral general
somatic motor nuclei and
special visceral motor nuclei
Lower part of the
nucleus of facial nerve
and nucleus of
hypoglossal nerve only
receive the fibers of
contralateral corticobulnar
tract.
Corticonuclear tract
Nucleus of Oculomotor n.
Nucleus of trochlear
Motor nucleus of trigeminal n.
Upper
lower
Nucleus of abducent n.
Nucleus of facial n.
Nucleus of ambiguus n.
Nucleus of hypoglossal n.
Nucleus of accessory n.
Reticular formation of brain stem
• Ascending reticular
activating system
(ARAS)
• Motor central and
vital centres
– Cardiovascular center
and respiratory center
• Serotonergic rapheal
nuclei
Transverse section through decussation of medial lemniscus
Gracile nucleus
Cuneate nucleus
Internal arcuate fiber
Spinal nucleus of
trigeminal n.
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Dorsal nucleus of
vagus n.
Nucleus of solitary tract
Nucleus of ambiguus
Nucleus of
hypoglossal n.
Decussation of medial
lemniscus
Hypoglossal n.
pyramidal tract
Transverse section through mid-olive level (medulla oblongata)
Necleus of hypoglossal n.
Dorsal nucleus
of vagus n.
Inferior cerebella
peduncle
Nucleus of
vestibular
Nucleus of
solitary tract
Spinal nucleus
of trigeminal n.
Nucleus of
ambiguus
Inferior olivary nucleus
Spinal thalamic
tract
Medial lemniscus
Hypoglossal n.
pyramid
Transverse section through facial colliculus (pons)
Nucleus of abducent n.
Genu of facial n.
Superior cerebella
peduncle
Spinal nucleus
of trigeminal n
Nucleus of facial n.
Lateral lamniscus
Medial lamniscus
& trapeziod body
Pontine nucleus
Pyramid tract
Transverse section through level of superior colliculus (midbrain)
Accessory nuleus of oculomotor n.
Superior colliculus
Mesencephlic nucleus of
trigeminal n.
Nucleus of oculomotor n.
Medial lemniscus
Red nucleus
Parieto-occipitotemporopontine
tract
Pyramid tract
Frontal pontine tract
Substential nigra