orbit r. shane tubbs, ms, pa-c, ph.d
DESCRIPTION
ORBIT R. Shane Tubbs, MS, PA-C, PH.D. BONY ORBIT. Supraorbital notch (foramen). Posterior ethmoidal foramen. Frontal bone. Anterior ethmoidal foramen. Orbital plate of ethmoid bone (lamina papyracea). Lesser wing of sphenoid. Lacrimal bone. Superior orbital fissure. - PowerPoint PPT PresentationTRANSCRIPT
ORBIT
R. Shane Tubbs, MS, PA-C, PH.D.
BONY ORBIT
Frontal bone
Lesser wing of sphenoid
Superior orbital fissure
Optic canal
Greater wing of sphenoid
Zygomatic bone
Inferior orbital fissure
Infraorbital groove& foramen
Maxillary bone
Orbital process ofpalatine bone
Fossa of lacrimal sac
Lacrimal bone
Orbital plate of ethmoid bone(lamina papyracea)
Anterior ethmoidal foramen
Posterior ethmoidal foramen
Supraorbital notch (foramen)
Brain Frontal sinus
Ethmoidal cells
Maxillary sinus
Nasal septumEthmoidal cells
Sphenoidal sinuses
Brain (in middle cranial fossa)Optic n.
Medial wall of orbit
Temporalis m.(in temporal fossa)
SHEATHS OF THE OPTIC NERVE
Central a. & v. of retina
Pia
Arachnoid
Dura
Subarachnoid space(Intervaginal space)
Optic disc
MUSCLES
Cornea
Iris folds
Lens
Sclera
Sphincter m. of pupil(miosis)
Dilator m. of pupil(mydriasis)
Ciliary m.(accommodation)
Ciliary body Fibers of ciliary zonule(suspensory lig. of lens)
INTRINSIC MUSCLES OF EYEBALL
MUSCLES OF THE UPPER EYELID
Levator palpebrae superioris
Superior tarsal muscle
Trochlea (pulley)
Inferior oblique m.Inferior rectus m.
Lateral rectus m. (cut)
Common annular tendon
Medial rectus m.
Superior rectus m.
Levator palpebrae superioris m.
Superior oblique m.
Superior tarsal plate
Levator palpebrae superioris m.
Superior rectus m. (cut)
Superior rectus m. (cut)
Lateral rectus muscle
Levator palpebrae superioris m. (cut)
Superior oblique m.
Medial rectus m.
Inferior rectus m.
Trochlea
MOVEMENTS AROUND THE VERTICAL AXIS
ADDUCTORS ABDUCTORS
Medial rectus
Superior rectus
Inferior rectus
Inferior oblique
Superior oblique
Lateral rectus
MOVEMENTS AROUND THE LATEROMEDIAL (TRANSVERSE) AXIS
ELEVATORS DEPRESSORS
Superior rectus
Inferior oblique
Inferior rectus
Superior oblique
MOVEMENTS AROUND THE A-P AXIS
INTORSION
EXTORSION
Superior rectus
Superior oblique
Inferior rectus
Inferior oblique
SO4, LR6, R3
ABDUCENT NERVE INJURY
PERIORBITA & FASCIA
Medial check ligamentLateral check ligament
Periorbita Periorbita
Medial rectus muscle and sheath
Bulbar sheath(Tenon’s capsule) Lateral rectus muscle
and sheath
Orbital fat
NERVES
N. F. L.
NF
L
POSITION OF CILIARY GANGLION
Ciliary ganglion
Lateral rectus
Optic nerve
Short ciliary nerves
VESSELS
Internal carotid a.
Ophthalmic a.
Muscular branch
Continuation of ophthalmic a.
Posterior ethmoidal a.
Anterior ethmoidal a.
Dorsal nasal a.
Supratrochlear a.
Medial palpebral a.
Lateral palpebral a.
Supraorbital a.
Posterior ciliary aa.
Lacrimal a.
Central a. of retina
Supratrochlear v.
Supraorbital v.
Angular v.
Facial v.
Vorticose vv.
Superior ophthalmic v.
Inferior ophthalmic v.
Cavernous sinus
Pterygoid plexus