Smallest branch of
trigeminal nerve, stems
from sensory root, only
carries afferent fibers
Branches off trigeminal ganglion
Exits skull at superior orbital fissure then branches into..
Frontal nerve
Afferent branch of V1 that runs
from the superior orbital fissure
along the roof of the orbit until it
branches into..
Supraorbital nerve
Sensory innervation of the forehead
and anterior scalp (V1 --> frontal nerve
--> supraorbital nerve)
Supratrochlear nerve
Sensory innervation of the bridge of the
nose and medial parts of the upper eyelid
and forehead (V1 --> frontal nerve -->
supratrochlear nerve)
Lacrimal nerve
Afferent branch of V1 that runs
from the superior orbital fissure
along the lateral roof of the orbit.
Sensory innervation for the lateral
part of the upper eyelid,
conjunctiva, and lacrimal gland.
(V1--> lacrimal nerve)
Also carries
parasympathetic
postganglionic fibers from
the greater patrosal nerve
of CN VII to the lacrimal
gland for tear production
Nasociliary nerve
Afferent branch of V1
that runs from the
superior orbital fissure
through the orbit, and
is superior to the optic
nerve (CN II). Branches
into..
Long ciliary nerve
Sensory innervation to
and from the eyeball.
Sensation, not vision.
(V1 --> nasociliary nerve
--> long ciliary nerve)
Infratrochlear nerve
Sensory
innervation to the
upper eyelid. (V1
--> nasociliary -->
infratrochlear)
Anterior ethmoidal nerve
Sensory innervation to
the lacrimal sac,
superficial nose, and
anterior nasal cavity (V1
--> nasociliary nerve -->
anterior ethmoidal)
Posterior ethmoidal nerve
Sensory innervation
to the paranasal
sinuses. (V1 -->
nasociliary nerve -->
posterior ethmoidal