Frontalis Muscle Contraction and the Role of Visual Deprivation and Eyelid Proprioception

Robert Beaulieu, Kaden Andre, Ronald Mancini

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

PURPOSE: To determine if frontalis muscle contraction can be induced by manipulating visual and eyelid proprioceptive inputs through simulating visual deprivation and ptosis. METHODS: Volunteers without prior eyelid or forehead pathologic study were recruited for this nonrandomized, prospective study. Baseline and study phase brow positions were documented. The first phase was to simulate visual deprivation and the second to simulate ptosis. The dominant eye was used for each phase. As a proxy to simulate visual field deprivation, a black contact lens was placed on the eye, which reduced vision to light perception. As a proxy to simulate ptosis, an external eyelid weight was placed on the upper eyelid. Brow position ratios were calculated at various points along the brow and statistical analysis was performed. RESULTS: Fifteen subjects participated. The average brow position ratio was 1.00 ± 0.08 for the visual deprivation group, which was not different from baseline (p = 0.86). The average brow position ratio for the external eyelid weight group was 1.13 ± 0.07, which was statistically significant compared with baseline and the visual deprivation group (p < 0.001). CONCLUSIONS: Inducing visual deprivation with a black contact lens does not lead to a change in brow position. However, placing an external eyelid weight does lead brow elevation, with an average increase of 13% from baseline. This suggests a likely role for proprioceptive or sensory inputs in frontalis muscle contraction in the setting of eyelid ptosis.

Original languageEnglish (US)
Pages (from-to)552-556
Number of pages5
JournalOphthalmic Plastic and Reconstructive Surgery
Volume34
Issue number6
DOIs
StatePublished - Nov 1 2018

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Proprioception
Eyelids
Muscle Contraction
Blepharoptosis
Contact Lenses
Proxy
Weights and Measures
Low Vision
Forehead
Visual Fields
Volunteers
Prospective Studies
Light

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology

Cite this

Frontalis Muscle Contraction and the Role of Visual Deprivation and Eyelid Proprioception. / Beaulieu, Robert; Andre, Kaden; Mancini, Ronald.

In: Ophthalmic Plastic and Reconstructive Surgery, Vol. 34, No. 6, 01.11.2018, p. 552-556.

Research output: Contribution to journalArticle

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AB - PURPOSE: To determine if frontalis muscle contraction can be induced by manipulating visual and eyelid proprioceptive inputs through simulating visual deprivation and ptosis. METHODS: Volunteers without prior eyelid or forehead pathologic study were recruited for this nonrandomized, prospective study. Baseline and study phase brow positions were documented. The first phase was to simulate visual deprivation and the second to simulate ptosis. The dominant eye was used for each phase. As a proxy to simulate visual field deprivation, a black contact lens was placed on the eye, which reduced vision to light perception. As a proxy to simulate ptosis, an external eyelid weight was placed on the upper eyelid. Brow position ratios were calculated at various points along the brow and statistical analysis was performed. RESULTS: Fifteen subjects participated. The average brow position ratio was 1.00 ± 0.08 for the visual deprivation group, which was not different from baseline (p = 0.86). The average brow position ratio for the external eyelid weight group was 1.13 ± 0.07, which was statistically significant compared with baseline and the visual deprivation group (p < 0.001). CONCLUSIONS: Inducing visual deprivation with a black contact lens does not lead to a change in brow position. However, placing an external eyelid weight does lead brow elevation, with an average increase of 13% from baseline. This suggests a likely role for proprioceptive or sensory inputs in frontalis muscle contraction in the setting of eyelid ptosis.

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