Anatomy of the Epicranial Aponeurosis

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What muscle raises the angle of the mouth in smiling and contributes to the depth and contour of the nasolabial furrow?

Orbicularis Oris

Risorius (correct)

Depressor Labii Inferioris

Platysma

Which muscle pulls the corner of the mouth laterally in numerous facial activities, including grinning and laughing?

Risorius

Platysma

Depressor Labii Inferioris (correct)

Orbicularis Oris

Which muscle draws the lower lip downwards and a little laterally in masticatory activity?

Orbicularis Oris

Risorius

Depressor Labii Inferioris (correct)

Platysma

Which muscle contributes to the expressions of irony, sorrow, melancholy, and doubt?

Depressor Labii Inferioris Signup and view all the answers

What is the vascular supply to the Depressor Labii Inferioris muscle?

Maxillary artery Signup and view all the answers

Which nerve supplies the Risorius muscle?

Facial nerve Signup and view all the answers

Where does the palpebral part of the orbicularis oculi muscle arise from?

Medial palpebral ligament, mainly from its superficial surface Signup and view all the answers

Which arteries supply the orbicularis oculi muscle?

Facial, superficial temporal, maxillary, and ophthalmic arteries Signup and view all the answers

Where is the lacrimal part of the orbicularis oculi muscle located?

Around the lacrimal sac Signup and view all the answers

What role does the sphincter muscle of the eyelids (lacrimal part) play in?

Various ocular reflexes Signup and view all the answers

Which nerve supplies the orbicularis oculi muscle?

Facial and trigeminal nerves Signup and view all the answers

What is the usual activation control for the orbital portion of the orbicularis oculi muscle?

Under voluntary control Signup and view all the answers

Which muscle surrounds the circumference of the orbit?

Orbicularis oculi Signup and view all the answers

What does the temporoparietalis muscle lie between?

Frontal parts of occipitofrontalis and anterior and superior auricular muscles Signup and view all the answers

Where do the upper orbital fibers of orbicularis oculi blend with?

Frontal part of occipitofrontalis Signup and view all the answers

To what is the aponeurosis attached laterally?

Zygomatic arch Signup and view all the answers

Which muscle is inserted into the skin and subcutaneous tissue of the eyebrow?

Orbicularis oculi Signup and view all the answers

What allows the aponeurosis to move freely over the scalp?

Loose connection to the underlying pericranium Signup and view all the answers

Where does Depressor Anguli Oris converge at the angle of the mouth?

Orbicularis Oris Signup and view all the answers

Which muscle is continuous below with Depressor Anguli Oris?

Platysma Signup and view all the answers

What is the vascular supply of Depressor Anguli Oris?

Inferior labial branch of the facial artery Signup and view all the answers

Which muscle consists of fibers that completely encircle the mouth?

Orbicularis Oris Signup and view all the answers

Where is Pars marginalis located within Orbicularis Oris?

On the labial side of the modiolus Signup and view all the answers

Which muscle may cross the midline to interlace with its contralateral fellows, forming the 'mental sling'?

Depressor Anguli Oris Signup and view all the answers

What is the main function of the Mentalis muscle?

Raising the lower lip and helping in protruding it Signup and view all the answers

Which facial muscle is responsible for drawing the angle of the mouth downwards and laterally?

Compound Sphincter Signup and view all the answers

How is the mentolabial sulcus affected during the opening of the mouth?

Becomes more horizontal and its central part deepens Signup and view all the answers

What is unique about the development of the Action buccal and mandibular branches of the facial nerve in human lips?

They are closely associated with speech and production of musical tones Signup and view all the answers

How many segments does the orbicularis oris muscle consist of?

Eight segments Signup and view all the answers

Where do some fibers of the orbicularis oris muscle originate from?

From the cheek and other muscles acting on the lips Signup and view all the answers

Anatomy of the Epicranial Aponeurosis

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Questions and Answers

What muscle raises the angle of the mouth in smiling and contributes to the depth and contour of the nasolabial furrow?

Which muscle pulls the corner of the mouth laterally in numerous facial activities, including grinning and laughing?

Which muscle draws the lower lip downwards and a little laterally in masticatory activity?

Which muscle contributes to the expressions of irony, sorrow, melancholy, and doubt?

What is the vascular supply to the Depressor Labii Inferioris muscle?

Which nerve supplies the Risorius muscle?

Where does the palpebral part of the orbicularis oculi muscle arise from?

Which arteries supply the orbicularis oculi muscle?

Where is the lacrimal part of the orbicularis oculi muscle located?

What role does the sphincter muscle of the eyelids (lacrimal part) play in?

Which nerve supplies the orbicularis oculi muscle?

What is the usual activation control for the orbital portion of the orbicularis oculi muscle?

Which muscle surrounds the circumference of the orbit?

What does the temporoparietalis muscle lie between?

Where do the upper orbital fibers of orbicularis oculi blend with?

To what is the aponeurosis attached laterally?

Which muscle is inserted into the skin and subcutaneous tissue of the eyebrow?

What allows the aponeurosis to move freely over the scalp?

Where does Depressor Anguli Oris converge at the angle of the mouth?

Which muscle is continuous below with Depressor Anguli Oris?

What is the vascular supply of Depressor Anguli Oris?

Which muscle consists of fibers that completely encircle the mouth?

Where is Pars marginalis located within Orbicularis Oris?

Which muscle may cross the midline to interlace with its contralateral fellows, forming the 'mental sling'?

What is the main function of the Mentalis muscle?

Which facial muscle is responsible for drawing the angle of the mouth downwards and laterally?

How is the mentolabial sulcus affected during the opening of the mouth?

What is unique about the development of the Action buccal and mandibular branches of the facial nerve in human lips?

How many segments does the orbicularis oris muscle consist of?

Where do some fibers of the orbicularis oris muscle originate from?

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