Second pharyngeal arch

Second pharyngeal arch
Head end of human embryo, about the end of the fourth week.
Floor of pharynx of embryo. (Second arch visible near center.)
Latin	arcus pharyngeus secundus
Gray's	subject #13 66
Code	TE E5.16.4.0.2.0.12

The second pharyngeal arch or hyoid arch (or second branchial arch) assists in forming the side and front of the neck.

Contents 1 Derivatives 1.1 Skeletal elements 1.2 Muscles 2 Nerve supply 3 Additional images 4 References 5 External links

Derivatives

Skeletal elements

From the cartilage of the second arch arises

• Stapes,

• Styloid process,

• Stylohyoid ligament, and

• Lesser cornu of the hyoid bone.

Muscles

• Muscles of face

• Occipitofrontalis muscle

• Platysma

• Stylohyoid muscle

• Posterior belly of Digastric

• Stapedius muscle

• Auricular muscles

Nerve supply

Facial nerve

Additional images

References

• This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

External links

• plastic/216 at eMedicine
• Overview at howard.edu
• Second branchial arch: Mnemonic

Human development of head and neck (GA 1.65, TE E5.3, 5.4) Face Nasal placode · Nasal pit · nasal prominences (Lateral, Medial) · Intermaxillary segment Frontonasal prominence · Maxillary prominence · Mandibular prominence (Meckel's cartilage) Oral cavity Palate Primary palate · Secondary palate Tongue Lateral lingual swelling · Tuberculum impar · Copula linguae · Hypopharyngeal eminence · Gustatory placode General branchial apparatus Pharyngeal groove (Cervical sinus) · Pharyngeal arch (1st, 2nd) · Pharyngeal pouch M: MOU anat/devp noco/cofa(c)/cogi/tumr, sysi proc (peri), drug (A1)