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"The First arch IMPACTS!"

Most of the aspects associated with the first arch begin with the letter 'M' and the rest with I, P, A, C, T or S!

1. Name

• It is also known as the Mandibular arch.

2. Muscles

• Muscles of  Mastication (Masseter, Temporalis, medial & lateral Pterygoids), Mylohyoid, Anterior belly of digastric, Tensor tympani and Tensor palati are derived from the first arch.

3. Cartilage of first arch is called the  Meckel's cartilage

• It gives rise to Malleus & Incus, Sphenomandibular ligament & Anterior ligament of Malleus

4. Innervation.

• Mandibular nerve, Chorda tympani

Did you know?

Branchial arches are mesodermal thickenings in the wall of the cranial most part of the foregut.

First arch (mandibular arch) is the only arch in human embryo having double innervation; chorda tympani (branch of facial nerve) is the pretrematic nerve and mandibular nerve is the post trematic nerve.