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posterior axioappendicular and scapulohumeral region
posterior axioappendicular and scapulohumeral region (muscles, nerves, vasculature)
18
Anatomy
Post-Graduate
04/05/2011

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Term
triangle of auscultation
Definition
Its a relative thinning of the musculature of the back situated along the medial border of the scapula.
It has the following boundaries:
1. Superiorly and medially, by the inferior portion of the Trapezius
2. Inferiorly, by the Latissimus dorsi
3. Laterally by the medial border of the Scapula
Term
extrinsic muscles of the shoulder
Definition
trapezius and latissimus dorsi
Term
Lumbar triangle of Petit (inferior lumbar triangle)
Definition
formed by borders of the iliac crest-external oblique abdominal muscle and lattisimus dorsi
part of the internal oblique abdominal muscle and its fascia are exposed here
Term
trapezius muscle attachments
Definition
from external occipital protuberance, and via the nuchal ligament into the superior nuchal line of the skull; the rest of the muscle attaches to spinous process of vertebrae C7-T12
Term
trapezius muscle insertion
Definition
lateral clavicle, acromion and spine of scapula
Term
motor innervation of trapezius muscle
Definition
spinal accessory nerve and the subtrapezial plexus
Term
blood supply for the trapezius muscle
Definition
superficial branch of the transverse cervical artery
Term
attachments of the latissimus dorsi
Definition
lower 5 or 6 thoracic vertebrae, the thoracolumbar fascia, the iliac crest and the lower 3 to 4 ribs
Term
main insertion of the latissimus dorsi
Definition
humerus
Term
Superficial group of extrinsic back muscles
Definition
trapezius muscle, the latissimus dorsi, rhomboid major and minor, and the Levator scapulae
Term
Dorsal Scapular nerve
Definition
It provides motor innervation to the rhomboid muscles, which pull the scapula towards the spine and levator scapulae muscle, which elevates the scapula.
Term
true deep intrinsic group of back muscles
Definition
from superficial to deep: splenius group (neck), the erector spinae (sacrospinalis) and the transversospinalis
Term
Splenius muscle origin and insertion
Definition
attaches from the nuchal ligament and from spinous processes C7-T6 and wraps laterally and superiorly to insert into the skull and into transverse processes of C1-C4
Term
name the 3 transversopinalis muscles
Definition
Semispinalis: Capitis, Cervicis, and thoracis muscles
Term
erector spinae muscles attachments
Definition
arise from a common tendon on the sacrum and iliac crests and ascend as 3 column of muscle fibers;
Term
insertion of iliocostalis muscle group (of the erector spinae muscles)
Definition
the last 8 ribs
Term
insertion of the longissimus group of the erector spinae muscles
Definition
medial group and largest of erector spinae muscles;
attaches to the transverse processes of all the thoracic vertebrae
Term
spinalis group insertion (of erector spinae muscles)
Definition
most medial of erector spinae muscles and extends to the spinous processes of T1-T8
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