PROCESS 



1182 



PROCESS 



small wing-like processes of the crista galli which sur- 

 round the foramen caecum. P., Alveolar, the 

 thick border of the upper or lower jaw containing 

 the sockets for the teeth. P., Ankyroid. Synonym 

 of P. Coracoid. P., Anterior Clinoid. See P., Cli- 

 noid. P., Apex, P., Apical, the large process extend- 

 ing from the apex of the pyramidal cells of the cerebral 

 cortex toward the free surface of the cortex. P., 

 Articular, the small processes projecting from the 

 upper and lower surfaces of the vertebrae, by means of 

 which adjacent vertebrae articulate with each other. 

 P., Auditory, the curved plate of bone surrounding 

 the external auditory meatus for the greater part of its 

 circumference, and serving for the attachment of the 

 cartilage of the external ear. P., Axis. Synonym 

 of P., Axis-cylinder. P., Axis-cylinder, that pro- 

 cess of a nerve-cell which becomes the axis-cylinder of 

 a nerve. P., Basilar (of the Occipital Bone), the 

 quadrilateral plate of bone in front of the foramen 

 magnum articulating with the sphenoid bone. P., 

 Calcarine. Synonym of Hippocampus minor. P., 

 Central Base, the axis cylinder process arising from 

 the central part of the base of the pyramidal cells of the 

 brain-cortex. Ps., Ciliary, plaitingsand foldings of the 

 layers of the choroid at its anterior margin. They are 

 received between corresponding foldings of the suspen- 

 sory ligament of the lens, and are from 60 to 80 in 

 number. Ps., Ciliary (of the Retina), the anterior 

 part of the retina, in close contact with the choroidal 

 ciliary processes. Ps., Clinoid, projections on the 

 body and lesser wings of the sphenoid bone. There 

 are three : the anterior is formed by the inner extrem- 

 ity of the lesser wings ; the middle, a small eminence, 

 one on each side, bounding the pituitary fossa or sella 

 turcica anteriorly ; the posterior, a tubercle on each 

 side of the dorsum sellse. P., Cochleariform. See 

 Processus cochlea r if or mis. P., Condylar, P., Condy- 

 loid, the posterior process of the lower jaw, consisting 

 of the articular condyle and the neck which supports 

 it. P., Conoid, the tuberosity of the clavicle. P., 

 Coracoid, the hook-like process projecting from the 

 scapula above the glenoid cavity. See Coracoid. P. 

 Coronoid: 1. A thin, flattened process projecting 

 from the anterior portion of the upper border of the 

 ramus of the lower jaw, and serving for the attachment 

 of the temporal muscle. 2. A triangular projection 

 from the upper end of the ulna, forming the lower 

 part of the great sigmoid cavity. 3. Synonym of P., 

 Coracoid. P., Costiform, the transverse processes of 

 the lumbar vertebrae supposed to be rudimentary ribs. 

 P., Deiters', the single, large, unbranched process 

 of a multipolar nerve-cell, which becomes the axis- 

 cylinder of a medullated nerve-fiber. P., Ensiform, 

 the cartilaginous tip at the lower end of the sternum. 

 Same as Metasternum. P., Ethmoid, one of the 

 projections from the superior border of the inferior 

 turbinated bone, which joins the unciform process of 

 the ethmoid bone. P., External Angular, the pro- 

 jection on the outer extremity of the supraorbital arch 

 of the frontal bone, which articulates with the malar 

 bone. P., External Nasal, a small lamina forming 

 the outer portion of the nostril in the embryo. P., 

 External Orbital. Synonym of P., External Ang- 

 ular. P., Falciform : 1. A process of the fascia 

 lata of the thigh, forming the outer and upper margin 

 of the saphenous opening. It is known also as the 

 /'., Falciform, of Burns. 2. A prolongation of the 

 great sacro-sciatic ligament along the ramus of the 

 ischium. Same as Falx cerebri. P. of Folius, the 

 long process of the malleus. P., Frontal, a process 

 of the malar bone articulating with the frontal bone. 

 P., Hamate (of the Ethmoid hone). Synonym of P., 



Unciform. P., Hamular : 1. A hook-like process 

 of bone on the lower extremity of the internal ptery- 

 goid plate, around which the tendon of the tensor 

 palati turns. 2. Of the lacrymal bone, the hook-like 

 termination of the lacrymal crest. P. of the Helix, 

 a small projection of cartilage at the front part of 

 the pinna, where the helix bends upward. P., In- 

 ferior Maxillary, the first post-oral arch. P., Infe- 

 rior Turbinated, the middle turbinated bone. P., 

 Inferior Vermiform, the central projection on the 

 lower surface of the cerebellum, between the two 

 hemispheres. Ps. of Ingrassius, the lesser wings 

 of the sphenoid bone. P., Intermaxillary. Syn- 

 onym of P., Pronto-nasal. P., Internal Angular, 

 the inner extremity of the supraorbital arch of the 

 frontal bone. P., Jugular, a rough prominence exter- 

 nal to the condyles of the occipital bone, channeled by 

 a deep notch which forms part of the jugular foramen. 

 P., Lacrymal, a short, pointed process of the inferior 

 turbinated bone which articulates with the lacrymal 

 bone. P., Lateral Base, one of the branching pro- 

 cesses of a pyramidal nerve-cell, arising from the thick- 

 est part of the latter. P., Lateral Frontal. Synonym 

 of P. , External Nasal. P. of Lenhossek. Synonym 

 of P., Reticular. P., Lenticular, the extremity of 

 the long process of the incus, covered with cartilage 

 and articulating with the stapes. P., Long (of the In- 

 cus), a slender process that descends vertically from 

 the body of the incus and articulates, by the lenticular 

 process, with the head of the stapes. P., Long (of the 

 Malleus), a long, delicate process that passes from the 

 neck of the malleus outward to the Glaserian fissure, 

 to which it is connected by cartilaginous and ligament- 

 ous fibers. P., Malar, a triangular eminence of the 

 superior maxilla by which it articulates with the malar 

 bone. Ps., Mammillary, the tubercles on the posterior 

 part of the superior articular processes of the lumbar 

 vertebrae. P., Mastoid, a conical projection at the 

 base of the mastoid portion of the temporal bone. It 

 contains the mastoid cells and the antrum. P., 

 Maxillary, a thin plate of bone descending from the 

 ethmoid process of the inferior turbinated bone, and 

 hooking over the lower edge of the orifice of the 

 antrum. P., Maxillo-palatine. Synonym of /' ., 

 Superior Maxillary. P., Mental. Synonym of 

 Prominence, Mental. P., Middle Clinoid. See P., 

 Clinoid. P., Midfrontal. Synonym of P., Fronto- 

 nasal. P., Modeling: I. A method of healing 

 wounds while the part is immersed in water, 

 artney.) 2. Set P., Molding. P., Molding, the change 

 in shape of the fetal skull during labor, to accommo- 

 date itself to the shape of the pelvic canal. P., 

 Morbid, the structural changes induced by < 

 Ps., Muscular, the processes of a vertebra to which 

 muscles are attached. P., Nasal (of tin- 

 Bone). Synonym of Spine, Nasal. P., Nasal (</ 

 the Superior Maxilla), a. thick, triangular pro* 

 bone that projects upward, inward, and back ward by 

 the side of the nose, forming a part of its lateral w;ill. 

 P., Nerve. Synonym of P., Axis-cylinder. P.. 

 Odontoid, the tooth-like process of the axis which 

 ascends and articulates with the atlas. P., Olecranon. 

 Synonym of Olecranon. P., Olivary, -a small, olive- 

 like eminence situated behind the optic groove ol the 

 sphenoid bone. P., Orbicular. Synonym ot P . 

 Lenticular. P., Orbital (of the Superior Maxil/a),* 

 process projecting from the orbital margin of ' ne 

 superior maxilla. ' P., Orbital (of the Palate 

 process directed upward and outward from the upper 

 portion of the palate bone by means of which th 

 latter articulates with the superior maxillary, the sphe- 

 noid, turbinated, and the ethmoid bones. The superior 



