Nerve centers for sphincter muscles of the iris in the fowl.
D000818:Animals; D002467:Cell Nucleus; D002645:Chickens / Q000033:anatomy & histology*; D002923:Cilia / Q000502:physiology; D005724:Ganglia / Q000033:anatomy & histology; D007498:Iris / Q000033:anatomy & histology* / Q000166:cytology; D009474:Neurons / Q000502:physiology; D009801:Oculomotor Muscles / Q000166:cytology / Q000294:innervation*; D009802:Oculomotor Nerve / Q000166:cytology; D011680:Pupil / Q000033:anatomy & histology / Q000166:cytology