254 Mr. J. S. R. Russell. On the Nerve Roots of 



As a corollary to this part of the subject, I tried whether the 

 results obtained by the last method of experimentation are in any 

 way altered when the root or roots are divided some weeks pre- 

 viously, instead of at the time when the epileptic spasms are induced. 



b. Analysis of Results* 



It was found most convenient and instructive to place together the 

 results obtained in Parts I and II of the former investigation, and I 

 see no reason for altering this method of description in detailing the 

 following results. 



Part I. Compound movements obtained by excitation of the whole 

 nerve root. 



Part. II. Minute differentiation obtained by excitation of the indi- 

 vidual natural bundles of the nerve root. 



1st Lumbar Root. No intrinsic movement of the limb. 



2nd Lumbar Root. No intrinsic movement of the limb. 



3rd Lumbar Root. Slight flexion at the hip. 



4th Lumbar Root. Part I. Flexion at the hip, with the thigh 

 adducted and the leg extended at the knee. 



Part II. (l)tFlexion at the hip. 



(2) Adduction of the thigh. 



(3) Extension at the knee. 



5th Lumbar Root. Part I. Extension of the whole limb with 

 adduction and internal rotation of the thigh and dorsiflexion of the 

 foot. 



Part II. (I) Adduction of the limb. 



(2) Extension at the knee. 



(3) Dorsiflexion of the foot. 



(4) Extension of the digits. 



(5) Extension of the hallux. 



6th Lumbar Root. Part I. The limb extended at the hip, adducted 

 and rotated outwards ; flexed at the knee, with the foot at right 

 angles and everted at the ankle, the digits and hallux being flexed at 

 the distal phalangeal joints. 



* These results are based on a large number of experiments, and although varia- 

 tions were met with, the results which appeared to be the most constant are those 

 given here. 



f The small numbers in brackets denote the bundles from which a different 

 movement was obtained when such bundles were separated in a nerve root. Only 

 those'-bundles destined for the supply of muscles of the extremity are noted, which 

 accounts in part for so few bundles being mentioned in connexion with some roots ; 

 but the variation in the size of the different roots is also responsible for this. 



