Advanced Anatomy Lab 10 : Muscles and joints Exam Questions
and Answers With complete solution–Expert Verified | Latest
Questions 2025
What are the attachments of platysma?: Inferior boarder of mandible, skin of lower face, and
fascia covering pectoralis major and deltoid muscles
What are the actions of platysma?: Draws corners of mouth inferiorly and widens mouth, drawsskin
of neck superiorly
What is the innervation of platysma?: Facial nerve
What are the attachments of both heads of sternocleidomastoid?: Mastoid process
of temporal bone, superior nuchal line of occipital bone
What is the attachment of the sternal head of sternocleidomastoid?: Manubriumof
sternum
What is the attachment of the clavicular head of sternocleidomastoid?: Medial
clavicle
What is the unilateral action of sternocleidomastoid?: Laterally flexes neck and rotates
head
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,What is the bilateral action of sternocleidomastoid?: Extends head at atlanto-occipital joint,
flexes neck when head is flexed, and flexes lower neck when upper neck and head are extended; head protrudes
anteriorly
What is the innervation of sternocleidomastoid?: Spinal accessory nerve
What are the attachments of omohyoid?: Superior boarder of scapula and body of hyoid
What is the action of omohyoid?: Depresses and retracts hyoid
What is the innervation of omohyoid?: Ansa cervicalis
What are the attachments of sternohyoid?: Manubrium of sternum, medial clavicle, and body
of hyoid
What is the action of sternohyoid?: Depresses hyoid
What is the innervation of sternohyoid?: Ansa cervicalis
What are the attachments of sternothyroid?: Manubrium of sternum and thyroid cartilage
What is the action of sternothyroid?: Depresses larynx
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and Answers With complete solution–Expert Verified | Latest
Questions 2025
What are the attachments of platysma?: Inferior boarder of mandible, skin of lower face, and
fascia covering pectoralis major and deltoid muscles
What are the actions of platysma?: Draws corners of mouth inferiorly and widens mouth, drawsskin
of neck superiorly
What is the innervation of platysma?: Facial nerve
What are the attachments of both heads of sternocleidomastoid?: Mastoid process
of temporal bone, superior nuchal line of occipital bone
What is the attachment of the sternal head of sternocleidomastoid?: Manubriumof
sternum
What is the attachment of the clavicular head of sternocleidomastoid?: Medial
clavicle
What is the unilateral action of sternocleidomastoid?: Laterally flexes neck and rotates
head
1/3
,What is the bilateral action of sternocleidomastoid?: Extends head at atlanto-occipital joint,
flexes neck when head is flexed, and flexes lower neck when upper neck and head are extended; head protrudes
anteriorly
What is the innervation of sternocleidomastoid?: Spinal accessory nerve
What are the attachments of omohyoid?: Superior boarder of scapula and body of hyoid
What is the action of omohyoid?: Depresses and retracts hyoid
What is the innervation of omohyoid?: Ansa cervicalis
What are the attachments of sternohyoid?: Manubrium of sternum, medial clavicle, and body
of hyoid
What is the action of sternohyoid?: Depresses hyoid
What is the innervation of sternohyoid?: Ansa cervicalis
What are the attachments of sternothyroid?: Manubrium of sternum and thyroid cartilage
What is the action of sternothyroid?: Depresses larynx
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