Deep petrosal nerve

Deep petrosal nerve
Alveolar branches of superior maxillary nerve and sphenopalatine ganglion. (Deep petrosal labeled at bottom, center-right.)
Details
FromInternal carotid plexus
ToNerve of pterygoid canal
Identifiers
Latinnervus petrosus profundus
TA98A14.3.02.008
TA26647
FMA67549
Anatomical terms of neuroanatomy

The deep petrosal nerve is a post-ganglionic branch of the (sympathetic) internal carotid (nervous) plexus (which is in turn derived from the superior cervical ganglion, a part of the cervical sympathetic trunk) that enters the cranial cavity through the carotid canal, then passes perpendicular to the carotid canal in[1] the cartilaginous substance which fills the[citation needed] foramen lacerum to unite with the (parasympathetic) greater petrosal nerve to form the nerve of pterygoid canal (Vidian nerve).[1]

Anatomy

intermediate grey column (of spinal cord at around the level of T1) → white rami communicantes (of cervical part of sympathetic chain) → superior cervical ganglion (synapse) → gray rami communicantes → internal carotid plexus → deep petrosal nerve → nerve of pterygoid canal → pterygopalatine ganglion (fibres pass through without synapsing) → zygomatic nerve → zygomaticotemporal nerve → lacrimal nerve

Origin

The cell bodies of pre-ganglionic sympathetic axons that subsequently give synapse with neurons of the deep petrosal nerve reside in the intermediate grey column of the spinal cord at around the spinal level of T1. The pre-ganglionic axons ascend in the sympathetic trunk to synapse at the superior cervical ganglion where the cell bodies of the fibres of the deep petrosal nerve are situated. The post-ganglionic fibres do not synapse again and ultimately innervate their target tissues directly.[1]

Function

The deep petrosal nerve carries post-ganglionic sympathetic axons which are ultimately distributed to the blood vessels (to mediate vasoconstriction[citation needed]), and exocrine glands of the lacrimal gland, nasal cavity, and oral cavity (to mediate secretomotor function).[1]

Additional images

  • Sympathetic connections of the pterygopalatine and superior cervical ganglia.
    Sympathetic connections of the pterygopalatine and superior cervical ganglia.
  • Depicts nerve branches that are involved in the autonomic innervation of the lacrimal gland. The terminal parts of the pathway are variable between individuals and differ for the other glands of the deep face.
    Depicts nerve branches that are involved in the autonomic innervation of the lacrimal gland. The terminal parts of the pathway are variable between individuals and differ for the other glands of the deep face.

References

  1. ^ a b c d Goosmann, Madeline M.; Dalvin, Mark (2023), "Anatomy, Head and Neck, Deep Petrosal Nerve", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 30521238, retrieved 2023-07-31

Public domain This article incorporates text in the public domain from page 892 of the 20th edition of Gray's Anatomy (1918)


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