PAS 407 Axilla (armpit) (Exam 1) UPDATED ACTUAL Questions and CORRECT
Answers
contracts to protract the scapula (pull arm forward)
- important muscle in quadrupeds to elevate thorax while
walking
action of serratus anterior
- assist in keeping scapula flat against thoracic wall, pre-
vent drooping of thoracic wall when standing or walking
long thoracic nerve
innervation of serratus anterior
- lateral thoracic artery
during axillary surgeries, trauma (object gets jammed in
axilla), resulting in paralysis of serratus anterior;
results in scapular winging** in pushup position (unable
to hold scapula flat against body wall)
when can long thoracic nerve be injured?
image: scapular winging
supplies the superior part of the pectoral region (sub-
clavius, intercostal spaces 1 and 2, portions of pectoralis
major/minor, serratus anterior)
superior thoracic artery common site for aneurism (pathological bulging of vascu-
lar wall);
may compress closely associated nerves of brachial
plexus, resulting in pain, paresthesia
radiating pain and numbness down upper extremity
, Refers to a
weakening of an
artery wall that
creates a
Answers
contracts to protract the scapula (pull arm forward)
- important muscle in quadrupeds to elevate thorax while
walking
action of serratus anterior
- assist in keeping scapula flat against thoracic wall, pre-
vent drooping of thoracic wall when standing or walking
long thoracic nerve
innervation of serratus anterior
- lateral thoracic artery
during axillary surgeries, trauma (object gets jammed in
axilla), resulting in paralysis of serratus anterior;
results in scapular winging** in pushup position (unable
to hold scapula flat against body wall)
when can long thoracic nerve be injured?
image: scapular winging
supplies the superior part of the pectoral region (sub-
clavius, intercostal spaces 1 and 2, portions of pectoralis
major/minor, serratus anterior)
superior thoracic artery common site for aneurism (pathological bulging of vascu-
lar wall);
may compress closely associated nerves of brachial
plexus, resulting in pain, paresthesia
radiating pain and numbness down upper extremity
, Refers to a
weakening of an
artery wall that
creates a
