By V. Angar. University of Nevada, Reno.
Part I: The effect of rectus femoris transfer loca- tion on knee motion discount desyrel 100 mg on line anxiety young adults. Rectus femoris surgery in children with cerebral palsy purchase 100 mg desyrel anxiety and alcohol. Part II: A comparison between the effect of trans- fer and release of the distal rectus femoris on knee motion. Treatment of stiff-knee gait in cerebral palsy: a comparison by gait analysis of distal rectus femoris transfer versus proximal rectus release. Rectus femoris transfer to im- prove knee function of children with cerebral palsy. Miller F, Cardoso Dias R, Lipton GE, Albarracin JP, Dabney KW, Castagno P. The effect of rectus EMG patterns on the outcome of rectus femoris transfers. Chambers H, Lauer A, Kaufman K, Cardelia JM, Sutherland D. Prediction of outcome after rectus femoris surgery in cerebral palsy: the role of cocontraction of the rectus femoris and vastus lateralis. Functional outcomes of strength training in spastic cere- bral palsy. Effects of quadriceps femoris muscle strengthening on crouch gait in children with spastic diplegia. Fatigue fractures of the lower patellar pole in adolescents with cere- bral movement disorders. Radiographic abnormalities and clinical symptoms associated with patella alta in ambulatory children with cerebral palsy. Results of surgical correction of flexion contrac- tures of the knee joint in CP children (author’s transl. Reinforcement of the tension of the knee extensor ap- paratus in triple-flexion gait in children with motor disorders. Rev Chir Orthop Reparatrice Appar Mot 1985;71:301–10. Treatment of severe tor- sional malalignment syndrome. Villani C, Billi A, Morico G, Calvisi V, Romanini L. Considerations on defor- mity of the foot and suprasegmental pathology in infantile cerebral palsy. Kinematic and kinetic analysis of dis- tal derotational osteotomy of the leg in children with cerebral palsy. External tibial torsion and the effectiveness of the solid ankle-foot orthoses. Rotational osteotomy of the distal tibia and fibula. Dodgin DA, De Swart RJ, Stefko RM, Wenger DR, Ko JY. Distal tibial/fibular derotation osteotomy for correction of tibial torsion: review of technique and re- sults in 63 cases. Supramalleolar derotation osteotomy for lateral tibial torsion and associated equinovarus deformity of the foot. A comparison of the proximal and distal osteotomy levels. Split tibialis posterior tendon transfer with concomitant dis- tal tibial derotation osteotomy in children with cerebral palsy. Rotational osteotomies of the leg: tibia alone versus both tibia and fibula. Valgus deformity of the ankle joint: pathogenesis of fibular shortening. The Grice extraarticular subtalar arthrodesis: a clinical review.
Microglial cells destroy invading microorganisms and phagocytose cellular debris discount 100mg desyrel with amex anxiety or depression. EPENDYMAL CELLS For many years buy 100mg desyrel free shipping anxiety symptoms 89, it had been The ependymal cells are ciliated cells that line the cavities (ventricles) of the CNS believed that damaged neurons in and the spinal cord. In some areas of the brain, the ependymal cells are function- the CNS could not regenerate, for it ally specialized to elaborate and secrete cerebrospinal fluid (CSF) into the ven- was thought that there were no pluripotent tricular system. The beating of the ependymal cilia allow for efficient circulation stem cells (cells that could differentiate into of the CSF throughout the CNS. The CSF acts as both a shock absorber protect- various cell types found in the CNS) in the ing the CNS from mechanical trauma and a system for the removal of metabolic CNS. The CSF can be aspirated from the spinal canal and analyzed to determine found within the ependymal layer can act as whether disorders of CNS function, with their characteristic CSF changes, are neural stem cells, which under appropriate stimulation can regenerate neurons. Capillary Structure In the capillary beds of most organs, a rapid passage of molecules occurs from the blood through the endothelial wall of the capillaries into the interstitial fluid. Thus, the composition of interstitial fluid resembles that of blood, and specific receptors or transporters in the plasma membrane of the cells being bathed by the interstitial fluid may directly interact with amino acids, hormones, or other compounds from the blood. In the brain, transcapillary movement of substrates in the peripheral cir- culation into the brain is highly restricted by the blood-brain barrier. This barrier limits the accessibility of blood-borne toxins and other potentially harmful com- pounds to the neurons of the CNS. CHAPTER 48 / METABOLISM OF THE NERVOUS SYSTEM 885 The blood-brain barrier begins with the endothelial cells that form the inner lin- Inside of capillary ing of the vessels supplying blood to the CNS (Fig. Unlike the endothelial cells of other organs, these cells are joined by tight junctions that do not permit the movement of polar molecules from the blood into the interstitial fluid bathing the neurons. They also lack mechanisms for transendothelial transport that are present in other capillaries of the body. These mechanisms include fenestrations (“win- 4 dows” or pores that span the endothelial lining and permit the rapid movement of 5 molecules across membranes) or transpinocytosis (vesicular transport from one side of the endothelial cell to another). Because they contain a variety of drug-metabolizing enzyme systems similar to the 2 Narrow intercellular spaces drug-metabolizing enzymes found in the liver, the endothelial cells can metabolize 3 Lack of pinocytosis neurotransmitters and toxic chemicals and, therefore, form an enzymatic barrier to entry of these potentially harmful substances into the brain. They actively pump 4 Continuous basement membrane hydrophobic molecules that diffuse into endothelial cells back into the blood (espe- cially xenobiotics) with P-glycoproteins, which act as transmembranous, ATP- 5 Astrocyte extension dependent efflux pumps. Although lipophilic substances, water, oxygen, and carbon dioxide can readily cross the blood-brain barrier by passive diffusion, other mole- Fig. Differential transporters on the luminal pounds in the blood cannot freely pass into the and abluminal endothelial membranes can transport compounds into, as well as out brain; they must traverse the endothelial cells, basement membrane, and astrocytes, by use of of, the brain. Further protection against the free entry of blood-borne compounds into the CNS Very lipophilic molecules may pass through all is provided by a continuous collagen-containing basement membrane that com- of these membranes in the absence of a carrier. The basement membrane appears to be surrounded by the foot processes of astrocytes. Thus, compounds must pass through endothe- lial cell membranes, the enzymatic barrier in the endothelial cells, the basement membrane, and possibly additional cellular barriers formed by the astrocytes to reach the neurons in the brain. Transport through the Blood-Brain Barrier Many nonpolar substances, such as drugs and inert gases, probably diffuse through the endothelial cell membranes. A large number of other compounds are transported through the endothelial capillaries by facilitative transport, whereas others, such as nonessential fatty acids, cannot cross the blood-brain barrier. Essential fatty acids, A number of disorders of glucose however, are transported across the barrier. The most com- mon of these is facilitated glucose trans- 1. FUELS porter protein type 1 (GLUT1) deficiency syndrome. In this disorder, GLUT1 trans- Glucose, which is the principle fuel of the brain, is transported through both porters are impaired, which results in a low endothelial membranes by facilitated diffusion via the GLUT-1 transporter (see Fig. GLUT-3 transporters present on the neurons then allow the neurons to trans- tion known as hypoglycorrhachia). Although nostic indication of this disorder is that in the the rate of glucose transport into the ECF normally exceeds the rate required for presence of normal blood glucose levels the energy metabolism by the brain, glucose transport may become rate-limiting as ratio of CSF glucose to blood glucose levels blood glucose levels fall below the normal range. Clinical features are variable rience hypoglycemic symptoms at approximately 60 mg/dL, as the glucose levels but include seizures, developmental delay, and a complex motor disorder.
10 of 10 - Review by V. Angar
Votes: 163 votes
Total customer reviews: 163