Abstract
An analysis of ocular movements was performed in four patients with retraction nystagmus and paralysis of the upward gaze. The clinical and radiological data indicate that the lesion were relatively limited to the most rostral and dorsal portion of the mesencephalon. The electrooculographic examination disclosed not otherwise obvious abnormalities of horizontal ocular movements. The most prominent defect was a tendency to perform hypometric saccades followed by multiple corrective movements. This tendency was particularly evident in saccadic movements toward a light spot unexpectedly displaced in the visual field of the subject. It is suggested that lesions responsible for retraction nystagmus can also affect the visuomotor integration mechanisms: the foveation of the target is then obtained through a typical modification of the motor strategy.
| Original language | English |
|---|---|
| Pages (from-to) | 139-148 |
| Number of pages | 10 |
| Journal | Italian Journal of Neurological Sciences |
| Volume | 1 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jun 1979 |
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Keywords
- Eye movement
- Superior colliculus
- Visuomotor integration
ASJC Scopus subject areas
- Neuroscience(all)
- Clinical Neurology
Cite this
Oculomotor abnormalities in patients with lesions involving the tectal region. / Girotti, F.; Cefalà, A.; Sghirlanzoni, A.; Savoiardo, M.; Avanzini, G.
In: Italian Journal of Neurological Sciences, Vol. 1, No. 2, 06.1979, p. 139-148.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Oculomotor abnormalities in patients with lesions involving the tectal region
AU - Girotti, F.
AU - Cefalà, A.
AU - Sghirlanzoni, A.
AU - Savoiardo, M.
AU - Avanzini, G.
PY - 1979/6
Y1 - 1979/6
N2 - An analysis of ocular movements was performed in four patients with retraction nystagmus and paralysis of the upward gaze. The clinical and radiological data indicate that the lesion were relatively limited to the most rostral and dorsal portion of the mesencephalon. The electrooculographic examination disclosed not otherwise obvious abnormalities of horizontal ocular movements. The most prominent defect was a tendency to perform hypometric saccades followed by multiple corrective movements. This tendency was particularly evident in saccadic movements toward a light spot unexpectedly displaced in the visual field of the subject. It is suggested that lesions responsible for retraction nystagmus can also affect the visuomotor integration mechanisms: the foveation of the target is then obtained through a typical modification of the motor strategy.
AB - An analysis of ocular movements was performed in four patients with retraction nystagmus and paralysis of the upward gaze. The clinical and radiological data indicate that the lesion were relatively limited to the most rostral and dorsal portion of the mesencephalon. The electrooculographic examination disclosed not otherwise obvious abnormalities of horizontal ocular movements. The most prominent defect was a tendency to perform hypometric saccades followed by multiple corrective movements. This tendency was particularly evident in saccadic movements toward a light spot unexpectedly displaced in the visual field of the subject. It is suggested that lesions responsible for retraction nystagmus can also affect the visuomotor integration mechanisms: the foveation of the target is then obtained through a typical modification of the motor strategy.
KW - Eye movement
KW - Superior colliculus
KW - Visuomotor integration
UR - http://www.scopus.com/inward/record.url?scp=34250249977&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34250249977&partnerID=8YFLogxK
U2 - 10.1007/BF02335843
DO - 10.1007/BF02335843
M3 - Article
C2 - 7341541
AN - SCOPUS:0019307360
VL - 1
SP - 139
EP - 148
JO - Italian Journal of Neurological Sciences
JF - Italian Journal of Neurological Sciences
SN - 0392-0461
IS - 2
ER -