Freeze-fracture faces of the perineurial sheath of the rabbit sciatic nerve

1975 ◽  
Vol 4 (3) ◽  
pp. 261-270 ◽  
Author(s):  
E. Reale ◽  
L. Luciano ◽  
M. Spitznas
Keyword(s):  
Sciatic Nerve ◽  
Freeze Fracture ◽  
Rabbit Sciatic Nerve ◽  
Perineurial Sheath

Calcium content of frog sciatic nerve during chronic hypocalcemia and hypercalcemia

1987 ◽  
Vol 253 (4) ◽  
pp. R655-R660
Author(s):  
K. C. Wadhwani ◽  
H. Levitan ◽  
S. I. Rapoport
Keyword(s):  
Plasma Concentration ◽  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Plasma Concentrations ◽  
Calcium Regulation ◽  
Calcium Content ◽  
Plasma Calcium ◽  
Ionized Calcium ◽  
Steady State Plasma Concentration ◽  
Perineurial Sheath

We examined the calcium contents of desheathed peripheral nerve, perineurial sheath, and whole sciatic nerve in the frog as a function of the steady-state plasma concentration of ionized calcium. Chronic hypocalcemia was induced by parathyroidectomy and by bathing frogs in a phosphate medium. Chronic hypercalcemia was induced by administering vitamin D3 and by bathing frogs for up to 2 wk in medium containing 50 mM CaCl2. Calcium was measured with a calcium-sensitive electrode and by atomic absorption spectroscopy. The calcium contents (mmol/kg wet wt) in whole nerve, desheathed nerve, and the perineurial sheath varied linearly with slopes of 0.72, 0.71, and 1.72, respectively, with plasma concentration (mM) of ionized calcium, which ranged from 0.3 to 8.0 mM. In the same animals the calcium content in the cerebrum was independent of plasma calcium between 0.5 and 1.5 mM but rose at higher plasma concentrations. Our results indicate that net calcium concentration in the frog peripheral nerve is not regulated during chronic hypocalcemia and hypercalcemia, whereas brain calcium is regulated at plasma calcium concentrations less than 1.5 mM. The lack of calcium regulation in the nerve is attributed to the lack of calcium regulation in the endoneurial compartment.

Perineurium of sciatic nerve in normal and diabetic rodents: freeze-fracture study of intercellular junctional complexes

1991 ◽  
Vol 20 (6) ◽  
pp. 459-470 ◽  
Author(s):  
A. Schiavinato ◽  
A. R. Morandin ◽  
D. Guidolin ◽  
E. Lini ◽  
M. G. Nunzi ◽  
...  
Keyword(s):  
Sciatic Nerve ◽  
Freeze Fracture ◽  
Fracture Study ◽  
Junctional Complexes

scholarly journals Neural architecture in transected rabbit sciatic nerve after prolonged nonreinnervation

1998 ◽  
Vol 192 (4) ◽  
pp. 529-538 ◽  
Author(s):  
J. L. BRADLEY ◽  
D. A. ABERNETHY ◽  
R. H. M. KING ◽  
J. R. MUDDLE ◽  
P. K. THOMAS
Keyword(s):  
Sciatic Nerve ◽  
Neural Architecture ◽  
Rabbit Sciatic Nerve
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