Inferior branch of oculomotor nerve

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Nerve: Inferior branch of oculomotor nerve
Plan of oculomotor nerve. (Inferior branch visible at bottom.)
Latin	ramus inferior nervi oculomotorii
Gray's	subject #198 884
Innervates	Inferior rectus, Medial rectus, Inferior oblique, Ciliary
From	oculomotor nerve
Dorlands / Elsevier	r_02/12690314

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The inferior branch of the oculomotor nerve or the inferior division, the larger, divides into three branches.

• One passes beneath the optic nerve to the medial rectus.
• Another, to the inferior rectus.
• The third and longest runs forward between the inferior recti and lateralis to the inferior oblique. From the last a short thick branch is given off to the lower part of the ciliary ganglion, and forms its short root.

All these branches enter the muscles on their ocular surfaces, with the exception of the nerve to the inferior oblique, which enters the muscle at its posterior border.

Additional images

Nerves of the orbit. Seen from above.

Nerves of the orbit, and the ciliary ganglion. Side view.

Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure.

Pathways in the Ciliary Ganglion.

v • d • e Nerves of head and neck: the cranial nerves and nuclei
olfactory (AON->I)	olfactory bulb - olfactory tract
optic (LGN->II)	optic chiasm - optic tract
oculomotor (ON,EWN->III)	superior branch (parasympathetic root of ciliary ganglion/ciliary ganglion) - inferior branch
trochlear (TN->IV)	no significant branches
trigeminal (PSN,TSN,MN,TMN->V)	trigeminal ganglion • ophthalmic • maxillary • mandibular
abducens (AN->VI)	no significant branches
facial (FMN,SN,SSN->VII)	near origin nervus intermedius • geniculate inside facial canal greater petrosal (pterygopalatine ganglion) - nerve to the stapedius - chorda tympani (lingual nerve, submandibular ganglion) at stylomastoid foramen posterior auricular - suprahyoid (digastric, stylohyoid) - parotid plexus (temporal, zygomatic, buccal, mandibular, cervical)
vestibulocochlear (VN,CN->VIII)	cochlear (striae medullares, lateral lemniscus) • vestibular (Scarpa's ganglion)
glossopharyngeal (NA,ISN,SN->IX)	before jugular fossa ganglia (superior, inferior) after jugular fossa tympanic (tympanic plexus, lesser petrosal, otic ganglion) • stylopharyngeal branch • pharyngeal branches • tonsillar branches • lingual branches • carotid sinus
vagus (NA,DNVN,SN->X)	before jugular fossa ganglia (superior, inferior) after jugular fossa meningeal branch - auricular branch neck pharyngeal branch (pharyngeal plexus) - superior laryngeal (external, internal) - recurrent laryngeal (inferior) - superior cervical cardiac thorax inferior cardiac - pulmonary - vagal trunks (anterior, posterior) abdomen celiac - renal - hepatic - anterior gastric - posterior gastric
accessory (NA,SAN->XI)	cranial - spinal
hypoglossal (HN->XII)	lingual branches

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .