983 
(for example the accessory nerve-endings of the eye-muscle after 
the cutting of the nervus trochlearis near the mid-brain) which 
causes the motor nerve-endings of Kürnrr to degenerate, there was 
room for the conclusion, that the accessory nerve-fibres and their 
endorgans were of sympathetic origin, and perhaps had something 
to do with the tonie innervation of the striated muscle’), In my 
first paper, which dealt with these nerve-fibres (Congress Utrecht, 
April 1909), this conclusion was already drawn by me’). In the years 
1913 and 1914 strong supporting evidence has been given to it by 
the admirable physiological experiments of px Boxr*). 
In Fig. 1 is shown a degenerated motor nerve-ending (m) in a 
Fig. 1. 
Nerve-endings in muscle-fibres of the musc. obl, sup. 
oculi of the cat, 3!/, days after section of the nervus 
trochlearis. 
af = accessory (sympathetic) fibre with end-organ, not 
degenerated. 
m = degenerated motor nerve-fibre with degenerated 
end organ. 
muscle-fibre of the superior oblique muscle of the eye-ball of a cat 
some days after section of the nervus trochlearis near the mid-brain. 
The accessory non-medullated nerve-fibre (af) is not degenerated, 
« 
1) See note 2, p. 982. 
*) Proceedings of the 9th phys. and medical Congress. Utrecht, April 1909. See 
also the more detailed description in the Anat. Anzeiger 44, Band, 1913. 
5) S. DE Boer. Folia Neuro-biologica 1913 and 1914, 
