Thoracic Wall 1 Flashcards
The thoracic cage is formed by ___ pairs of
ribs, the _____, _____ cartilages, and 12 _____ vertebrae.
12; sternum; costal; thoracic
The part of the rib that attaches to the sternum is (osseous or cartilaginous)?
Cartilaginous
What are the functions of the thoracic wall? (3)
- PROTECTION of contents in the thoracic cavity and upper abdominal cavity.
- RESPIRATION
- ATTACHMENT for skin, fascia, and overlying muscles of the neck, thorax, upper limbs, abdomen, and back.
What are the ANTERIOR boundaries of thoracic cage? (2)
Sternum and costal cartilages
What is the LATERAL boundaries of thoracic cage?
RIBS
What are the POSTERIOR boundaries of thoracic cage? (2)
Thoracic vertebrae and IV discs
Communication occurs between the thoracic cavity, the neck and the abdomen is through the _____ and _____ thoracic apertures, respectively.
superior; inferior
Superior Thoracic Aperture (thoracic inlet) is bounded by ___, the ___ ribs plus their cartilages and the _____ border of the
manubrium.
T1; 1st; superior
Trachea, esophagus, nerves and blood vessels that either supply or drain the head, neck and upper extremities ALL PASS THROUGH what structure?
Superior thoracic aperture (thoracic inlet)
Inferior Thoracic Aperture (thoracic outlet) is bounded by ___, the ___ and ___ pairs of ribs, costal cartilages of ribs _ - _ and the _____
joint.
T12; 11th; 12th; 7-10; xiphisternal
Which thoracic aperture is more spacious, superior or inferior?
Inferior
Which thoracic aperture is CLOSED BY THE DIAPHRAGM separating the thorax from the abdomen?
Inferior
Structures pass to and from the thorax to the abdomen travels through which 3 openings?
- Esophageal Hiatus
- Aortic Hiatus
- Inferior Vena Caval Hiatus
Esophageal Hiatus is located at which vertebral level?
T10 (“I Eat Asparagus”: T8, T10, T12)
Aortic Hiatus is located at which vertebral level?
T12 (“I Eat Asparagus”: T8, T10, T12)
Inferior Vena Caval Hiatus is located at which vertebral level?
T8 (“I Eat Asparagus”: T8, T10, T12)
Twigs of RIGHT PHRENIC NERVE travels through which hiatus?
Inferior Vena Caval Hiatus (T8)
Anterior and Posterior Vagal Trunk travels through which hiatus?
Esophageal Hiatus (T10)
Thoracic Duct travels through which hiatus?
Aortic Hiatus (T12)
Twigs of the Right Phrenic Nerve carries what type of information?
Somatic sensory
Twigs of the Right Phrenic Nerve provides somatic sensory to _____ _____ abdominal wall under the diaphragm.
Superior posterior
Pain within the superior posterior abdominal wall will be referred to which body part?
Shoulder
Typical THORACIC vertebrae have vertebral arches and __ processes for muscular and articular attachments.
7
Special features of THORACIC VERTEBRAE:
-Long, _____ angled spinous processes.
-Costal facets on the _____ transverse processes (except the last 2 or 3 thoracic vertebrae).
-2 _____ located laterally on the bodies of T2-T9
vertebrae.
- Inferiorly
- Anterior
- Demifacets
THORACIC VERTEBRAE: The _____ demifacet articulates with the head the rib of the same number.
Superior
The inferior demifacet articulates with the head of the rib _____ to it (higher number).
Inferior
Spinous process of T6 is at which vertebral (body) level?
T7 (Projects inferiorly)
- Which thoracic vertebrae are TYPICAL?
- Which ribs are TYPICAL?
T2-T9 (Has uniform structures)
Ribs 3-9
Which ribs are considered as “True Rib”?
Ribs 1-7 (Each rib will articulate the sternum individually)
Which ribs are considered as “False Ribs”?
Ribs 8-10 (These ribs share ONE costochondral joint)
Which ribs are considered as “Floating Ribs”?
Ribs 11-12 (Does NOT attach to the sternum)
__ vertebrae has only a single costal facet for the 1st rib and a
demifacet for the superior part of the head of the _____ rib on each side of the body.
T1; second
T10 has a costal facet that is partly on its _____ and partly on its _____, plus a demifacet on each side of the body.
body; pedicle
Does T10 have Inferior demifacet?
NO