QuestionSBA
QuestionChoice
The external intercostal muscles originate at the lower border of the rib and inserts onto the superior border of the rib below it. The external intercostal muscles expand the thoracic cage by elevating and extending the sternum.
10041341
a
Attachment for external intercostal muscle
QuestionChoice
Serratus anterior is a fan shaped muscle. It originates from the superolateral aspects of the first to eighth ribs and inserts onto the medial border of the scapula. Serratus anterior allows for the scapula to be pulled forward, and around the thorax. It also works with trapezius to permit rotation and abduction of the arm. Damage to the long thoracic nerve or accessory nerves can result in winging of the scapula.
10041343
c
Attachment for serratus anterior muscle
QuestionChoice
The pectoralis minor originates from ribs 3-5 and inserts onto the coracoid process of the scapula. Pectoralis minor moves the scapula forward and downward thereby stabilising the scapula.
10041345
e
Attachment for pectoralis minor muscle
QuestionChoice
The transversus thoracis attaches at the posterior surface of the sternum to the internal surface of costal cartilages of ribs 2-6. The transversus thoracis is an accessory muscle of respiration and aids during forced expiration.
10041342
b
Attachment for transversus thoracis muscle
QuestionChoice
The serratus posterior muscles are two paired muscles, located in the back. They extend obliquely from the ligamentum nuchae of cervical and thoracic vertebral column to ribs 2-5. They elevate and depress the ribs thereby aiding forced respiration.
10041344
d
Attachment for serratus posterior superior muscles
Concept
Chapter
2693
4088
Rib structure
Topic
198
Thoracic anatomy
20567
Picture
3166
171 - Rib structure (external intercostal).png
images/f9c78eue1727764758564.jpg
images/f9c78eue1727764758564_256.jpg
images/f9c78eue1727764758564_512.jpg
ltgJB4CHeYh2d4iPdkiIp4h02SQMBJMO
Topic
198
Thoracic anatomy
What is a function of the labelled structure? [lightgallery]
a