ECOS II Exam 1 jmm UPDATED ACTUAL Questions and
CORRECT Answers
Rib heads articulate with? 1. own vertebra
2. vertebra above
Example: what does rib 6 articulate with? bottom of T5 @ inferior costal facet, top of T6 @ superior costal facet, T6 at
transverse process
rib neck the area between the tubercle and rib head
rib tubercle articulates with the costal facet on the transverse process
rib angle abrupt change in rib curvature
what are the exceptions with ribs 1, 10, 11, and 12? these ribs only articulate with their own vertebrae
what are the exceptions with ribs 11 and 12? no tubercles so no articulation with transverse processes
ribs 1, 2, 11, 12 (sometimes 10) atypical ribs
ribs 3-9 (sometimes 10) typical ribs
true ribs and their details? ribs 1-7, cartilage attaches to sternum
false ribs and their details? ribs 8-12; the cartilage of ribs 8-10 attaches to the costal cartilage of the rib
above
floating ribs and their details? ribs 11 and 12; no anterior attachment
sternum (gold star on slide) looks like a sword; manubrium, body, xiphoid process
Sternal angle (Angle of Louis) is located at? rib 2 costal cartilage
anterior scalene origin? anterior tubercles of transverse processes of C3-6
anterior scalene insertion superior surface of 1st rib
anterior scalene innervation cervical spinal nerves C4-6
anterior scalene action elevates the first rib
middle scalene origin posterior tubercles of transverse processes T2-T7
middle scalene insertion superior surface of 1st rib
middle scalene innervation cervical spinal nerves of C3-8
middle scalene action elevates 1st rib
, posterior scalene origin posterior tubercles of the transverse processes of C5-C7
posterior scalene insertion 2nd rib
posterior scalene innervation cervical spinal nerves C6-8
posterior scalene action elevates 2nd rib
pectoralis minor origin anterior superior surface of ribs 3-5
pectoralis minor insertion coracoid process of the scapula
pectoralis minor innervation medial pectoral nerve
pectoralis minor action stabilizes the scapula, draws it inferiorly and anteriorly
serratus anterior origin & insertion origin: anterior surface of the medial border of the scapula
insertion: superior lateral surface of ribs 2-8
serratus anterior innervation & action innervation: long thoracic nerve
action: protracts the scapula
latissimus dorsi origin & insertion origin: lower 4 ribs
insertion: intertubercular groove of the humerus
latissimus dorsi innervation & action innervation: thoracodorsal nerve
action: extends, adducts, medially rotates the humerus
quadratus lumborum origin & insertion origin: iliac crest and iliolumbar ligament
insertion: inferior aspect of rib 12
quadratus lumborum innervation & action innervation: T12-L4
action: fixes the 12th rib in inhalation
external intercostal m starts from spine around to costal cartilage
"hands in pockets"
internal intercostal m starts from rib angle to sternum
"hands in back pockets"
innermost intercostal m starts from rib angle to costal cartilage
"hands in back pockets"
diaphragm innervation and action? innervation: phrenic nerve (C3-5)
action: descends during inspiration
how do the nerve, artery and vein run in the costal VAN (vein, artery, nerve)
groove?
where does VAN run? costal groove between internal intercostal and innermost intercostal muscles
what motion do ribs 6-10 undergo? bucket handle (move superiorly and laterally)
CORRECT Answers
Rib heads articulate with? 1. own vertebra
2. vertebra above
Example: what does rib 6 articulate with? bottom of T5 @ inferior costal facet, top of T6 @ superior costal facet, T6 at
transverse process
rib neck the area between the tubercle and rib head
rib tubercle articulates with the costal facet on the transverse process
rib angle abrupt change in rib curvature
what are the exceptions with ribs 1, 10, 11, and 12? these ribs only articulate with their own vertebrae
what are the exceptions with ribs 11 and 12? no tubercles so no articulation with transverse processes
ribs 1, 2, 11, 12 (sometimes 10) atypical ribs
ribs 3-9 (sometimes 10) typical ribs
true ribs and their details? ribs 1-7, cartilage attaches to sternum
false ribs and their details? ribs 8-12; the cartilage of ribs 8-10 attaches to the costal cartilage of the rib
above
floating ribs and their details? ribs 11 and 12; no anterior attachment
sternum (gold star on slide) looks like a sword; manubrium, body, xiphoid process
Sternal angle (Angle of Louis) is located at? rib 2 costal cartilage
anterior scalene origin? anterior tubercles of transverse processes of C3-6
anterior scalene insertion superior surface of 1st rib
anterior scalene innervation cervical spinal nerves C4-6
anterior scalene action elevates the first rib
middle scalene origin posterior tubercles of transverse processes T2-T7
middle scalene insertion superior surface of 1st rib
middle scalene innervation cervical spinal nerves of C3-8
middle scalene action elevates 1st rib
, posterior scalene origin posterior tubercles of the transverse processes of C5-C7
posterior scalene insertion 2nd rib
posterior scalene innervation cervical spinal nerves C6-8
posterior scalene action elevates 2nd rib
pectoralis minor origin anterior superior surface of ribs 3-5
pectoralis minor insertion coracoid process of the scapula
pectoralis minor innervation medial pectoral nerve
pectoralis minor action stabilizes the scapula, draws it inferiorly and anteriorly
serratus anterior origin & insertion origin: anterior surface of the medial border of the scapula
insertion: superior lateral surface of ribs 2-8
serratus anterior innervation & action innervation: long thoracic nerve
action: protracts the scapula
latissimus dorsi origin & insertion origin: lower 4 ribs
insertion: intertubercular groove of the humerus
latissimus dorsi innervation & action innervation: thoracodorsal nerve
action: extends, adducts, medially rotates the humerus
quadratus lumborum origin & insertion origin: iliac crest and iliolumbar ligament
insertion: inferior aspect of rib 12
quadratus lumborum innervation & action innervation: T12-L4
action: fixes the 12th rib in inhalation
external intercostal m starts from spine around to costal cartilage
"hands in pockets"
internal intercostal m starts from rib angle to sternum
"hands in back pockets"
innermost intercostal m starts from rib angle to costal cartilage
"hands in back pockets"
diaphragm innervation and action? innervation: phrenic nerve (C3-5)
action: descends during inspiration
how do the nerve, artery and vein run in the costal VAN (vein, artery, nerve)
groove?
where does VAN run? costal groove between internal intercostal and innermost intercostal muscles
what motion do ribs 6-10 undergo? bucket handle (move superiorly and laterally)
