Anatomy Superficial Back Flashcards
The three categories of back muscles are…
Superficial, Intermediate, and Deep
The superficial, intermediate, and deep back muscles are all formed from the…
Mesoderm
These two categories of back muscles are formed from the same mesoderm as the anterior trunk and upper limbs
Superficial and Intermediate
The deep back muscles are innervated by which rami?
Dorsal
The superficial and intermediate back muscles are innervated by which rami?
Anterior (ventral)
The trapezius muscle is innervated by the…
Accessory nerve
The origin of the trapezius muscle is the… The insertion is the…
Origin: External occipital protuberance, nuchal ligament (extends from EOP to C7), medial superior nuchal line, spinous process of vertabrae C7-T12 Insertion: Lateral one third of the clavicle, acromion of scapula
The trapezius receives its blood from the
tranverse cervical artery
Actions of the trapezius….
Rotation, retraction, elevation, depression of the scapula
The latissimus dorsi is innervated by the….
Thoracodorsal nerve
The origin of the vertebral part of the latissimus dorsi is the… The insertion of the vertebral part of the latissimus dorsi is the… Origin of the scapular part Insertion of the scapular part Origin of the costal part Insertion of costal part Origin of iliac part Insertion of iliac part
Origin of vertebral: Spinous processes of vertebrae T7-T12, thoracolumbar fascia (sacrum) Origin of scapular: scapula (inferior angle) Origin of costal: Ribs 9-12 Origin of iliac: Iliac crest (posterior on third Insertion of all: Crest of lesser tuberosity of humerus (anterior angle)
The blood supply of the latissimus dorsi comes from the….
Thoracodorsal branch of the subscapular artery
The actions of the latissimus dorsi are…
Adducts, extends, and medially rotates the arm when insertion is move towards origin. When origin moves towards insertion, it is a powerful rotator of the trunk
These are layers of flat broad tendons that have a shiny, whitish silvery color and are histologically similar to tendons. The are sparingly supplied with blood vessels and nerves. They join muscles to the body parts they act on.
Aponeurosis
The latissimus dorsi is attaches to this aponeuroses,
Thoracolumbar fascia (anterior abdominal neuroses)
The deltoid muscle is innervated by the..
axillary nerve
The origin of the deltoid muscle is the… The insertion of the deltoid muscle is the…
Lateral clavicle, acromion, spine of scapula Deltoid tuberosity of the humerus
The blood supply of the deltoid comes from the…
Thoracoacromial artery, and the arterior/posterior humeral circumflex artery
The actions of the deltoid are..
Shoulder abduction, flexion, and extension
The infraspinatus is innervated by the..
Suprascapular nerve
The origin of the infraspinatus is the… The insertion of the infraspinatus is the..
Infraspinous fossa of the scapula Middle facet of the greater tubercle of the humerus
The blood supply of the infraspinatous comes from the…
Suprascapular and circumflex scapular arteries
The function of the infraspinatous is…
Lateral rotation of the arm and stabilizing the humerus
Teres major is innervated by the…
Lower subscapular nerve (segmental levels C5 and C6)
The origin of the teres major is the… The insertion of the teres major is the…
Inferior angle of the scapula Crest of lesser tuberosity of the humerus
The blood supply of the teres major comes from the…
Subscapular and circumflex scapular arteries
The function of the teres major is…
Adduct the humerus, internal (medial) rotation of the humerus, extend the humerus from a flexed position
The teres minor is innervated by the…
Axillary Nerve
The origin of the teres minor is the… The insertion of the teres minor is the…
Lateral border of the scapula Inferior facet of the greater tubercle of the humerus
The blood supply of the teres minor comes from the…
Posterior circumflex humeral artery and circumflex scapular artery
The function of the teres minor is to..
Laterally rotate the arm, stabilize the humerus
This category of back muscles is related to or involved in movements of the upper limb This category of back muscle is attached to the ribs and may serve a respiratory purpose Are these extrinsic or intrinsic back muscles? Therefore, deep muscles are…
Superficial Intermediate Extrinsic, originate embryologically from elsewhere in the body. intrinsic
This category of back muscles is directly related to the movement of the vertebral column and head
Deep muscles of the back
These two categories of back muscles are formed from the same mesoderm as the anterior trunk and upper limbs
Superficial and Intermediate
The deep back muscles are innervated by which rami?
Dorsal
The superficial and intermediate back muscles are innervated by which rami?
Anterior (ventral)
The trapezius muscle is innervated by the…
Accessory nerve
The origin of the vertebral part of the latissimus dorsi is the… The insertion of the vertebral part of the latissimus dorsi is the… Origin of the scapular part Insertion of the scapular part Origin of the costal part Insertion of costal part Origin of iliac part Insertion of iliac part
Origin of vertebral: Spinous processes of vertebrae T7-T12, thoracolumbar fascia (sacrum) Origin of scapular: scapula (inferior angle) Origin of costal: Ribs 9-12 Origin of iliac: Iliac crest (posterior on third Insertion of all: Crest of lesser tuberosity of humerus (anterior angle)
The blood supply of the latissimus dorsi comes from the….
Thoracodorsal branch of the subscapular artery
The actions of the latissimus dorsi are…
Adducts, extends, and medially rotates the arm when insertion is move towards origin. When origin moves towards insertion, it is a powerful rotator of the trunk
These are layers of flat broad tendons that have a shiny, whitish silvery color and are histologically similar to tendons. The are sparingly supplied with blood vessels and nerves. They join muscles to the body parts they act on.
Aponeurosis
The latissimus dorsi is attaches to this aponeuroses,
Thoracolumbar fascia (anterior abdominal neuroses)
The deltoid muscle is innervated by the..
axillary nerve
The origin of the deltoid muscle is the… The insertion of the deltoid muscle is the…
Lateral clavicle, acromion, spine of scapula Deltoid tuberosity of the humerus
The blood supply of the deltoid comes from the…
Thoracoacromial artery, and the arterior/posterior humeral circumflex artery
The actions of the deltoid are..
Shoulder abduction, flexion, and extension
The infraspinatus is innervated by the..
Suprascapular nerve
The origin of the infraspinatus is the… The insertion of the infraspinatus is the..
Infraspinous fossa of the scapula Middle facet of the greater tubercle of the humerus
The blood supply of the infraspinatous comes from the…
Suprascapular and circumflex scapular arteries
The function of the infraspinatous is…
Lateral rotation of the arm and stabilizing the humerus
Teres major is innervated by the…
Lower subscapular nerve (segmental levels C5 and C6)
The origin of the teres major is the… The insertion of the teres major is the…
Inferior angle of the scapula Crest of lesser tuberosity of the humerus
The blood supply of the teres major comes from the…
Subscapular and circumflex scapular arteries
The function of the teres major is…
Adduct the humerus, internal (medial) rotation of the humerus, extend the humerus from a flexed position
The teres minor is innervated by the…
Axillary Nerve
The origin of the teres minor is the… The insertion of the teres minor is the…
Lateral border of the scapula Inferior facet of the greater tubercle of the humerus
The blood supply of the teres minor comes from the…
Posterior circumflex humeral artery and circumflex scapular artery
The function of the teres minor is to..
Laterally rotate the arm, stabilize the humerus
This category of back muscles is related to or involved in movements of the upper limb This category of back muscle is attached to the ribs and may serve a respiratory purpose Are these extrinsic or intrinsic back muscles? Therefore, deep muscles are…
Superficial Intermediate Extrinsic, originate embryologically from elsewhere in the body. intrinsic
This category of back muscles is directly related to the movement of the vertebral column and head
Deep muscles of the back
The latissimus dorsi is innervated by the….
Thoracodorsal nerve
The origin of the trapezius muscle is the… The insertion is the…
Origin: External occipital protuberance, nuchal ligament (extends from EOP to C7), medial superior nuchal line, spinous process of vertabrae C7-T12 Insertion: Lateral one third of the clavicle, acromion of scapula
Actions of the trapezius….
Rotation, retraction, elevation, depression of the scapula
The trapezius receives its blood from the
tranverse cervical artery
The superficial, intermediate, and deep back muscles are all formed from the…
Mesoderm
The three categories of back muscles are…
Superficial, Intermediate, and Deep
The descending part of the trapezius originates at the… It inserts into the…
Occipital bone, spinous process of C1-C7 Clavicle (lateral third)
The tranverse part of the trapezius orginates at the.. It inserts into the..
Aponeurosis at T1-T4 spinous processes Acromion
The ascending part of the trapezius originates at the.. It inserts into the..
Spinous process of T5-T12 Scapular spine
The trapezius is innervated by two nerves..
Accessory Nerve (cranial nerve); Cervical plexus
The levator scapulae originates at the… It inserts into the
Tranverse process of C1-C4 Scapula (superior angle)
The levator scapulae is innervated by the…
Dorsal Scapular Nerve (C4-C5)
The actions of the levator scapulae are…
Draws scapula medially upward while moving inferior angle medially, inclines neck to the same side
The artery of the levator scapulae
Transverse cervical artery
The rhomboid minor originates off of the… It inserts into the…
Spinous process of C6, C7 Medial border of scapulaabove (minor) and below (major) scapular spine
The innervation of the rhomboid minor is…
The dorsal scapular nerve (C4-C5)
The action of the rhomboid minor is…
Steadies scapula, draws scapula medially upward
The blood supply of the rhomboid minor is…
Deep branch of the transverse cervical artery
The rhomboid major originates off the… It inserts into the…
Spinous process of T1-T4 vertebrae Medial border of scapula above (minor) and below (major) scapular spine
The rhomboid major is innervated by the…
Dorsal Scapular Nerve (C4-C5)
The action of the rhomboid major is…
Steadies scapula; draws scapula medially upward
The origin of the serratus posterior superior is…. The serratus posterior superior inserts into the
The nuchal ligament and spinous processes of C7-T3 Ribs 2-5
The innervation of serratus posterior superior is..
2-5 intercostal nerves
The serratus posterior superior is receives blood from the..
Intercostal arteries
The actions of the serratus posterior superior are…
Elevates the ribs, helping with inspiration
The serratus posterior inferior originates off the… It inserts of the…
Spinous processes of T11-L2 Ribs 9-12
The innervation of the serratus posterior inferior is the
Intercostal nerves T9-T12
The blood supply of the serratus posterior inferior is the…
Intercostal arteries
The action of the serratus posterior is…
Depress the lower ribs, aid in expiration
