176 Physiologie der Zellen, Gewebe und Organe. 



The essential difference between rigidity and ordinary muscular contraction lies in 

 the discontinuous character of the latter process. Mines. 



481) Slierringtou, C. S., Reflex Inhibition in the coordination of movements 

 and postures. lu: Quart. Journ. Exp. Physiol., Bd. VI, Heft 3, S. 251— 310, 1913. 



A general summary of the present state of knowledge with regard to inhibition in 

 the central nervous System. Inhibition takes part in correlating the activity of antago- 

 nistic motor centres. 



It is a great factor in grading muscular contraction. It assists in the production 

 of rhythmic reflexes. It connects the successive phases of reflexes of opposed, or parti- 

 ally opposed eflfect and makes the reactions of reflex centres more 'dead-beat'. Mines. 



482) Graham Brown, T., Studies in the physiology of the nervous system XII. 

 Rhythmic responses in the simple reflex-Progression-Scratcb. In: Quart. 

 Journ. Exp. Physiol., Bd. VI, Heft 1, S. 25—56, 1913. 



Description of a large number of instances of rhythmic response to the faradic 

 Stimulation of a single afferent nerve. Discussion of the relation of their rhythmic move- 

 ments to those involved in progressiou aud scratching. Mines. 



483) Oraham Brown, T., Studies in the physiology of the nervous system XIII. 

 The compounding of Stimuli in temporal succession. In: Quart. Journ. Exp. 

 Physiol., Bd. VI, Heft 3, S. 209—250, 1913. 



Experiments on the after effects of reflex reactions on other reflexes in decerebrate 

 aud sj^inal animals. Mines. 



484) Miller, J. K., On the reactions of the salivary centres. In: Quart. 

 Journ. Exp. Physiol, Bd. VI, Heft 1, S. 57—72, 1913. 



Stimulation of central end of the linguel nerve causes much secretion from 

 the submaxillary gland of the same side and less from the parotid. Stimulation of 

 the glossopharyngeal nerve causes much secretion from parotid gland of same 

 side and less from the submaxillary. Stimulation of central end of vagus causes 

 secretion from parotid and submaxillary glands. The reflexes are independent 

 of associated muscular movements. The chorda tympani contains afferent fibres 

 for the salivary reflex. The salivary secretion of curare poisoning is due to as- 

 phyxia. Two points in the medulla are localised, one causes parotid the other 

 submaxillary secretion when stimulated with extremely weak currents. 



Mines. 



485) (xruber, C.M., A comparison of naturally and artificially aroused 

 impulses under the influence of nerve blocks. In: Quart. Journ. Exp. 

 Physiol., Bd. VI, Heft 1, S. 21— 23, 1913. 



The phrenic nerve may be blocked for natural and artificial excitations by 

 electric currents or by freezing mixtures, especially well by liquid air. Generally, 

 the same strength of block was required for 'natural' impulses as for impulses 

 set up by Aveak electric Stimuli. The phrenic nerve contains afferent fibres, the 

 Stimulation of which may affect the discharges in the opposite phrenic nerve. 



Mines. 



486) Cramer, W. and Priugle, H., On the Coagulation of blood. In: 

 Quart. Journ. Exp. Physiol., Bd. VI, Heft 1, S. 1—12, 1913. 



Plasma separated by ordinary centrifugalisation still contains some platelets. 

 These can be removed by filtering through a Berkefeld filter. In the absence of 

 blood platelets Oxalate plasma does not clot on adding Ca-salts. Certain obser- 

 vations of Freund, Bordet and Gengou and Nolf are accounted for by the 

 presence of platelets in the plasmas used. The platelets disintegrate when brought 

 in contact with glass. Mines. 



