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- Outlines of physiological psychology
Outlines of physiological psychology
Author:
George Trumbull Ladd
Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER IX. SENSORY AND MOTOR FUNCTIONS OF THE CEREBRAL HEMISPHERES. — Continued. The region of the brain which is especially concerned with the motor func
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tions lies about the great central fissure, or Fissure of Rolando. More precisely, it embraces the ascending frontal convolution (gyrus centralis anterior), the ascending parietal (the gyrus centralis posterior), and the prolongation of the two on the median surface of the brain (in the lobulus paracentralii). LOCALIZATION OF THE MOTOR CENTRES ON THE CEREBRAL CORTEX. Areas excitable by Stimulation. — The original experiments of Fritsch and Hitzig located five areas on the cere- Fio. 63. — HItzlg's Motor Areas on the Cortex of the Dog. The left hemlsphere helongs to one animal, the right to another; a, the sulcu cmiciaius, around which the gyrus sigmoideus hends: 0000, area for the face. The other symhol are explained In the text. bral hemispheres of the dog, which responded to irritation with the movement of definite groups of muscles. They were (1) the centre for the muscles of the neck (A in the Fig.) ; (2) the centre for the extensor and adductor of the fore-limb (-H) ; (3) the centre for the bending and rotation of the same limb (+); (4) the centre for the hind- limb ( ); and (5) the facial centre (© — Q). These investigators also obtained contractions of the muscles of the back, tail, and abdomen by stimulating interlying points, but failed definitely to circumscribe areas for these muscles. The accompanying figure (No. 64) shows the numerous " centres of electrical irriration," which Dr. Fender Pio. 84. — Area on the Left Hemisphere of toe Monkey, by stimulating which Ferner obtains motion in definite groups of muscles. claimed, some six years later, to have discovered on the cerebral hemisphere...
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ISBN-13:
9780217267021
ISBN-10:
0217267025
Publication Date:
8/10/2009
Pages:
266
Rating:
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Publisher:
General Books LLC
Book Type:
Paperback
Members Wishing:
0
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