The parts of the PONS  are:

PONS
1.  Reticular Formation-Pons RPF
2.  Reticulotegmental Nucleus of the Pons RtTg
3.  Pontine  Reticular Nucleus PnR
   3.1.  Caudal Part of PnC
   3.2.  Oral Part of PnR
4.  Trigeminal Nerve and Nuclei 5NN
   4.1.  Sensory Root of... s5
   4.2.  Motor Root of... m5
   4.3.  Principal Tract of ...Pr5
   4.4.  Mesencephalic Tract of... me5
      4.4.1.  Nucleus of Mesencephalic Tract of... Me5
   4.5.  Spinal Tract of...sp5
   4.6.  Nucleus of Spinal Tract of... Sp5
      4.6.1.  Nucleus of..., Caudal Part Sp5C
         4.6.1.1.  Gelatinous Subnucleus Ge5
      4.6.2.  Nucleus of..., Interpositus Part Sp5I
      4.6.3.  Nucleus of..., Oral Part Sp5O
   4.7.  Motor Trigeminal Nucleus Mo5
   4.8.  Accessory Trigeminal Nucleus A5
   4.9.  Paratrigeminal Nucleus Pa5
      4.9.1.  Infratrigeminal Nucleus  Inf5
5.  Abducens Nerve and Nuclei 6NN
   5.1.  Root of Abducens Nerve 6n
   5.2.  Abducens Nucleus 6
6.  Facial Nucleus 7
   6.1.  Dorsal Intermediate Subn. of...7di
   6.2.  Dorsolateral Subn. of..7dl
   6.3.  Dorsomedial Subn. of..7dm
   6.4.  Lateral Subn. of..7l
   6.5.  Ventral Subn. of..7vi
   6.6.  Ventromedial Subn. of..7vm
   6.7.  Suprafacial Nucleus Su7
      6.7.1.  Retrofacial nucleus Ret7
7.  Central (periaqueductal) Grey CG
   7.1.  Dorsal Part of CGD
   7.2.  Medial Part of CGM
8.  Central Grey of the Pons CGPn
   8.1.  Ventral Central Grey  CGV
   8.2.  Marginal Grey (periventricular) MargG
   8.3.  Periventricular Central Grey  PCG
9.  Pontine Nuclei Pn
   9.1.  Lateral Pontine Nucleus PnL
   9.2.  Dorsal Pontine Nucleus PnD
   9.3.  Medial Pontine Nucleus PnM
   9.4.  Principal Pontine Nucleus PnP
10.  Suprageniculate Nucleus of the Pons SGe
11.  Parabrachial Nuclei PB
   11.1.  Dorsal (Lateral) Parabracheal Nucleus DPB
   11.2.  Ventral (Medial) Parabracheal Nucleus VPB
   11.3.  Kolliker-Fuse Parabracheal Nucleus KF
   11.4.  Parabrachial Pigmented Parabracheal Nuc  PBP
12.  A7-Dopaminergic  Nucleus A7DA
13.  Nucleus Locus Coeruleus LC
   13.1.  Nucleus Subcoeruleus SubC