THE ANATOMY OF THE PITUITARY BODY 



Hair (1938) described knoblike enlargements projecting 

 from nerves distributed in the pars glandularis, pars inter- 

 media, and pars tuberalis of the cat's pituitary body. These 

 enlargements lay in contact with the epithelial cells. In the 

 pars neuralis the nerves terminated in bulblike structures 

 similar to those described by others in the neural lobe of the 

 ox and of man. 



Fig. 5. — Colloid-formation in neurones of the supraoptic and paraventricular 

 nuclei. (From Peters, Z. Neur., 154, 331-44 [1936].) Colloid a as fine drop- 

 lets, b diffusely distributed, and c and d as large accumulations believed to follow 

 coalescence of smaller droplets. Vacuoles may appear to be empty, A o( e, or partly 

 filled, C of/, or completely filled, B oi e, with colloid. 



A number of French and German authors'* have called 

 attention to the peculiar morphology of the neurones of cer- 

 tain hypothalamic centers. Some of the morphological varia- 

 tions which may occur in the cells of the supraoptic and para- 

 ventricular nuclei are illustrated in Figure 5. The formation 

 of colloid by these or homologous neurones is said to be recog- 

 nizable not only in man and other mammals but also in other 

 vertebrates such as reptiles, amphibia, and fishes, as well as in 



■t Collin and collaborators (see the earlier volume), Scharrer (1933-35), Gaupp 

 (1935), Gaupp and Scharrer (1935), Peters (1935), and Roussy and Mosinger (1935- 

 36). Florentin (1937) discusses changes related to secretory activity of the pars in- 

 termedia (toad). Roussy and Mosinger (1937) also review anatomical evidence for 

 the secretion of pituitary hormones into the cerebrospinal fluid. 



