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Laboratory 34. Oral Cavity
Step 6. Sensory Innervation of the Tongue

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In the midline of the tongue, a median septum [frontal section] divides the tongue into right and left halves. Knowledge of this septum is useful in assessing the lymphatic drainage and innervation to the tongue.

Links and References:
Grant's: 7.81-7.84
Netter: 52