1. RANGEEN CHANDRAN R

2. SUPERIOR TARSAL MUSCLE
 Origin-Undersurface of levator palpebrae superioris.
 Insertion-superior tarsal plate of upper eyelid.
 Nerve supply-postganglionic sympathetic fibres of
superior cervical sympathetic ganglion.
 Action-elevation of upper eyelid.

4. CLINICAL
 Peripheral arterial arcade between levator aponeurosis
and upper border of superior tarsal muscle.
 So plane of dissection created between levator
aponeurosis and superior tarsal muscle.

5.  In thyroid eye disease,fibrosis and mast cell infiltration
of muscle occurs.
 Partial ptosis-in Horner’s syndrome(2mm ptosis)

6. INFERIOR TARSAL MUSCLE
 Origin-Capsulopalpebral fascia.
 Insertion-Inferior tarsal plate.
 Nerve supply-Post ganglionic sympathetic fibres of
superior cervical sympathetic ganglion
 Action-lower lid retraction.

7. ORBITALIS MUSCLE
 Vestigial muscle.
 Orbital muscle of muller.
 Crosses inferior orbital fissure and sphenomaxillary
fissure.
 Unites with periosteum of orbit.
 Action-Forward protrusion of eyeball.
 Nerve supply-post ganglionic sympathetic fibres from
superior cervical sympathetic ganglion.

8. CLINICAL
 Paralysis of orbitalis- enophthalmos
(Horner’s syndrome)