Shared Flashcard Set

Details

Anatomy Exam 1 Lecture 2
Muscles of the back and suboccipital girdle
66
Anatomy
Graduate
07/11/2016

Additional Anatomy Flashcards

 


 

Cards

Term
pectoral girdle
Definition
scapula and clavicle
Term
extrinsic back muscles
-development
-connections
-innervated
Definition
-migrate into the back during embryonic development, carrying their innervation
-connects upper extremity to vertebral column
-innervated by anterior rami of spinal nerves
Term
intermediate back muscles
-action
-innervated
Definition
helps in forced respiration
-innervated by anterior rami
Term
intrinsic (deep) back muscles
-what are they?
-innervation
Definition
true back muscles
innervated by posterior rami of spinal nerves
Term
trapezius attachments
Definition
from occipital bone, nuchal ligament, and thoracic spinous processes
---TO---
lateral clavicle, acromion, spine of scapula
Term
trapezius nerve supply
Definition
accessory nerve
CN XI
Term
Trapezius Action
Definition
Descending part elevates, ascending part depresses, and middle retracts the scapula.
---
Ascending + descending parts rotate glenoid cavity superiorly
Term
latissimus dorsi attachments
Definition
spinous processes of lower t6-sacral vertbrae via the thoracolumbar fascia, posterior 1/3 of iliac creast and last 3-4 ribs.
---to---
intertubercular groove of humerus
Term
latissimus dorsi nerve supply
Definition
Thoracodorsal nerve
C6, 7, 8
Term
latissimus dorsi action
Definition
extension, adduction, medial rotation of the arm. shoulder depression
Term
second layer extrinsic back muscles
Definition
levator scapulae
rhomboids
Term
first layer extrinsic back muscles
Definition
trapezius
latissimus dorsi
Term
levator scapulae attachments
Definition
FROM transverse processes Cv1-4 TO medial border of scapula above spine
Term
levator scapulae innervation
Definition
Dorsal scapular nerve (C5) & spinal nerves C3-4
Term
levator scapulae action
Definition
Elevates scapula
Term
rhomboid minor attachments
Definition
FROM lower nuchal ligament and Cv7-Tv1 TO medial border of scapula
Term
rhomboid minor innervation
Definition
Dorsal scapular nerve
Term
rhomboid minor action
Definition
Retract (adduct) scapula
Term
rhomboid major attachments
Definition
FROM lower nuchal ligament & spinous processes of (Tv2-5) TO medial border of scapula
Term
rhomboid major innervation
Definition
Dorsal scapular nerve
Term
Rhomboid major action
Definition
Retract (adduct) scapula
Term
interruption of the accessory nerve result
Definition
weakness in trapezius,
inability to shrug shoulders or raise arm above head due to impaired rotation
Term
interruption of thoracodorsal nerve result
Definition
weakness in latissimus dorsi,
Term
interruption of dorsal scapular nerve results
Definition
weakness in rhomboids, lateral shift in the position of the scapula
Term
intermediate back muscles of the back
Definition
serratus posterior superior
serratus posterior inferior
Term
Serratus posterior superior attachments
Definition
attaches from nuchal ligament & Tv1-3 to ribs 2-5
Term
Serratus posterior superior innervation
Definition
2nd -5th intercostal nerves
Term
Serratus posterior superior action
Definition
Elevates the upper ribs in forced INSPIRATION
Term
serratus posterior inferior attachments
Definition
attaches from Tv11-Lv2 to ribs 9-12
Term
serratus posterior inferior innervation
Definition
: 9th -11th intercostal nerves and subcostal N (T12)
Term
serratus posterior inferior action
Definition
Depresses the lower ribs in forced EXPIRATION
Term
Deep intrinsic back muscles, general action
Definition
maintain posture and control movements of the vertebral column
Term
deep intrinsic muscle fascia attachments
Definition
medial: nuchal ligament, spinous processes of vertebrae, supraspinous ligament, and median crest of sacrum

Lateral: transverse processes of cervical and lumbar vertebrae and angles of the ribs
Term
deep intrinsic back muscles
Definition
from superficial to deep:
Splenius
erector spinae
transversospinalis
Term
splenius capitis attachments
Definition
attaches from nuchal ligament & spinous processes of Cv7-Tv3 to mastoid process (temporal bone) & occipital bone
Term
splenius capitis action
Definition
Rotates head & flexes both head & neck toward the same (ipsilateral) side. Acting together they extend the head & neck
Term
Splenius cervicis attachments
Definition
attaches from Tv3-6 to transverse processes of Cv1-3
Term
Splenius cervicis
Action
Definition
Rotates & flexes head & neck toward the same (ipsilateral) side .Acting together they extend the head & neck
Term
erector spinae columns
Definition
from lateral to medial
-iliocostalis
-longissimus
-spinalis
Term
erector spinae attachments
Definition
three columns share a common origin:
from iliac crest, posterior sacrum, lumbar spinous processes, & supraspinous ligament.
Term
erector spinae action
Definition
Acting bilaterally, they extend vertebral column

Acting unilaterally, it bends vertebral column toward the same side (lateral flexion)
Term
longissimus capitis action
Definition
capitis bends head & rotates face to the contracting side when it acts unilaterally.
Term
transversospinalis parts
Definition
superficial to deep:
Semispinalis
mulitidus
rotatores
Term
transversospinalis attachments
Definition
Runs mainly from transverse processes superomedially to spinous processes of higher vertebrae
Term
transversospinalis action
Definition
Acting bilaterally, it extends vertebral column;

Acting unilaterally, it rotates column toward the opposite (contralateral) side
Term
Semispinalis location
Definition
& is located along the upper half of vertebral column, its fascicles span 4-6 spinal segments
Term
Semispinalis parts and insertions
Definition
2 parts
semispinalis capitis that inserts on the occipital bone;
semispinalis cervicis that inserts on spinous process of AXIS (Cv2)
Term
multifidous attachments
Definition
Arises from posterior sacrum , posterior superior iliac spine , aponeurosis of erector spinae , sacroiliac ligaments , mammillary processes of lumbar vertebrae, transverse processes of T1-T3 and articular processes of C4-C7. Inserts along the entire length of spinous processes, spanning 2-4 spinal segments
Term
rotatores location and attachments
Definition
arise from the transverse process of vertebrae & attach to the transverse process of vertebrae . shortest as they span 1-2 spinal segments. Extends from sacrum to Cv2.
Term
back sprain
Definition
an injury involving only ligamentous tissue or the attachment of ligament.
- Most commonly involves Erector spinae muscle.
Term
Suboccipital region muscles
Definition
-rectus capitis posterior major
-rectus capitis posterior minor
-obliquus capitis inferior
-obliquus capitis superior
Term
rectus capitis posterior major attachments and action
Definition
from Cv2 (axis) spinous process to occipital bone & extends head
Term
rectus capitis posterior minor
-attachments and action
Definition
muscle runs from posterior tubercle of Cv1 to occipital bone & it extends head
Term
obliquus capitis inferior
attachments
Definition
arises from the spinous process of C2 vertebra and inserts into transverse of C1 vertebra.
Term
Obliquus capitis superior
attachments
Definition
arises from the transverse of C1 and inserts into the occipital bone between the superior and inferior nuchal lines .
Term
suboccipital triangle innervation
Definition
posterior ramus of spinal nerve C1 (suboccipital nerve)
Term
boundaries of the suboccipital triangle
Definition
-Superomedially : rectus capitis posterior major
-Superolaterally : obliquus capitis superior
-Inferolaterally : obliquus capitis inferior
-Floor : posterior antlantooccipital membrane and posterior arch of atlas
-Roof : semispinalis capitis
Term
contents of the suboccipital triangle
Definition
-Posterior arch of atlas (Cv1)
-Vertebral artery
-Suboccipital nerve (C1)
Term
Trapezius blood supply
Definition
transverse cervical artery
Term
latissimus dorsi blood supply
Definition
thoracodorsal artery
Term
levator scapulae blood supply
Definition
dorsal scapular artery
Term
rhomboid major and minor blood supply
Definition
dorsal scapular artery
Term
serratus posterior (inferior and superior)
Definition
intersegmental artery
Term
splenius blood supply
Definition
dorsal rami of segmental artery
Term
longissimus blood supply
Definition
dorsal rami of segmental artery
Term
illiocostalis blood supply
Definition
dorsal rami of segmental artery
Supporting users have an ad free experience!