Pons
part 1
pons is above the medulla, below the midbrain and in front of
the cerebellum
inferior cerebellar peduncle is going to the cerebellum by
travelling under the middle cerebellar peduncle
the superior cerebellar peduncle is going to the cerebellum by
travelling unfer the the middle cerebellar peduncke
that means that the middle cerebellar peduncle covers parts of
the inferior and superior cerebellar peduncles
the 5th CN is attached to the midpontine pons at the
anterolateral aspect
🧠 pontomedullary sulcus is also called the inferior
pontine sulcus
vestibulocochlear nuclei, facial nucleus, abducens nucleus
should be seen if a cut is made in the lower part of the pons
if the upper part of the pons is cut then the trigeminal
nuclus would be seen (motor and sensory nuclei)
Why is the pons called pons?
Pons 1
, pons means bridge
it is called bridge
because on its superficial
surface, there is a
shallow groove in front of
it and there are a lot of
fibers going from it to
the cerebellum
the transverse
pontocerebellar fibers are
like a bridge across the
two cerebellar hemispheres
in the middle part of the
anterior part of the pons
there is a longitudinal
shallow depression. This
depression is for the basilar
artery
the vertebral arteries meet at the pontomedullary junction to
form the basilar artery
Pons 2
, the anterior part of the pons that has the pontine nuclei is
called the base of the pons
when the corticopontine fibers come down and terminate in the
pontine nuclei, they go to the cerebellar hemispheres by
crossing over on the contralateral side through the
contralateral middle cerebellar peduncle
so corticopontine fibers from the right cerebral hemisphere go
through the left middle cerebellar peduncle and corticopontine
fibers from the left cerebral hemisphere go to the right
middle cerebellar peduncle.
image occlude the superior and inferior pontine sulcus
BACK OF THE PONS (POSTERIOR ASPECT)
most important relationship to the back of the pons is the
cerebellum
Pons 3
part 1
pons is above the medulla, below the midbrain and in front of
the cerebellum
inferior cerebellar peduncle is going to the cerebellum by
travelling under the middle cerebellar peduncle
the superior cerebellar peduncle is going to the cerebellum by
travelling unfer the the middle cerebellar peduncke
that means that the middle cerebellar peduncle covers parts of
the inferior and superior cerebellar peduncles
the 5th CN is attached to the midpontine pons at the
anterolateral aspect
🧠 pontomedullary sulcus is also called the inferior
pontine sulcus
vestibulocochlear nuclei, facial nucleus, abducens nucleus
should be seen if a cut is made in the lower part of the pons
if the upper part of the pons is cut then the trigeminal
nuclus would be seen (motor and sensory nuclei)
Why is the pons called pons?
Pons 1
, pons means bridge
it is called bridge
because on its superficial
surface, there is a
shallow groove in front of
it and there are a lot of
fibers going from it to
the cerebellum
the transverse
pontocerebellar fibers are
like a bridge across the
two cerebellar hemispheres
in the middle part of the
anterior part of the pons
there is a longitudinal
shallow depression. This
depression is for the basilar
artery
the vertebral arteries meet at the pontomedullary junction to
form the basilar artery
Pons 2
, the anterior part of the pons that has the pontine nuclei is
called the base of the pons
when the corticopontine fibers come down and terminate in the
pontine nuclei, they go to the cerebellar hemispheres by
crossing over on the contralateral side through the
contralateral middle cerebellar peduncle
so corticopontine fibers from the right cerebral hemisphere go
through the left middle cerebellar peduncle and corticopontine
fibers from the left cerebral hemisphere go to the right
middle cerebellar peduncle.
image occlude the superior and inferior pontine sulcus
BACK OF THE PONS (POSTERIOR ASPECT)
most important relationship to the back of the pons is the
cerebellum
Pons 3
