Infratrochlear nerve
Encyclopedia
The infratrochlear nerve is given off from the nasociliary just before it enters the anterior ethmoidal foramen
.
It runs forward along the upper border of the medial rectus, and is joined, near the pulley of the superior oblique, by a filament from the supratrochlear nerve
.
It then passes to the medial commissure of the eye, and supplies the skin of the eyelids and side of the nose
, the conjunctiva
, lacrimal sac
and caruncle
.
". The term trochlea means "pulley" in Latin. Specifically, the trochlea referred to is a loop inside the orbit of the eye (trochlea of superior oblique
), through which the tendon of the superior oblique muscle passes.
Anterior ethmoidal foramen
Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina .The anterior ethmoidal foramen, situated about the middle of the lateral margin of the olfactory groove, transmits the anterior ethmoidal vessels and the anterior ethmoidal nerve; the...
.
It runs forward along the upper border of the medial rectus, and is joined, near the pulley of the superior oblique, by a filament from the supratrochlear nerve
Supratrochlear nerve
The supratrochlear nerve is a branch of the frontal nerve, which itself comes from the ophthalmic division of the trigeminal cranial nerve.It is smaller than the nearby supraorbital nerve...
.
It then passes to the medial commissure of the eye, and supplies the skin of the eyelids and side of the nose
Human nose
The visible part of the human nose is the protruding part of the face that bears the nostrils. The shape of the nose is determined by the ethmoid bone and the nasal septum, which consists mostly of cartilage and which separates the nostrils...
, the conjunctiva
Conjunctiva
The conjunctiva covers the sclera and lines the inside of the eyelids. It is composed of rare stratified columnar epithelium.-Function:...
, lacrimal sac
Lacrimal sac
The lacrimal sac is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla...
and caruncle
Caruncle
Caruncle may refer to:*In botany, an elaiosome , especially in the plant family Euphorbiaceae*In animal anatomy:**prostomium, the sensory organ of Annelid worms...
.
Etymology
Infratrochlear means "below the trochleaTrochlea
Trochlea is a term in anatomy. It refers to a grooved structure reminiscent of a pulley's wheel.Most commonly, trochleae bear the articular surface of saddle and other joints:* Trochlea of humerus* Trochlear process of the Calcaneus...
". The term trochlea means "pulley" in Latin. Specifically, the trochlea referred to is a loop inside the orbit of the eye (trochlea of superior oblique
Trochlea of superior oblique
The Trochlea of superior oblique is a pulley structure in the eye. The tendon of the superior oblique muscle passes through it. Situated on the superior nasal aspect of the frontal bone, it is the only cartilage found in the normal orbit....
), through which the tendon of the superior oblique muscle passes.