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Fig. 5. The response of intracellular calcium to methyl anthranilate (MA) in chick
trigeminal ganglion neurons is dependent on extracellular calcium. This figure
shows typical chick trigeminal neurons responding to (A) 100 mmol
l1 MA and (B) 100 mmol l1 capsaicin (CAP).
When the extracellular calcium is removed, the responses are null. When
extracellular calcium is re-introduced the responses return.