Spinal Cord And Dorsal Scapular Region Flashcards
At what lvl does the spinal cord terminate by
L1/L2
The spinal dural sac terminates at what segment in the spine ?
S2
What are the spinal meninges
Dura mater
Arachnoid Mater
Pia mater
What is the deltoid purposeful action
Doing yoga poses with arms overhead(all fibers) reaching for (anterior fibers) and putting on ( posterior fibers) a seat belt
Deltoid muscular action
Clavicular (anterior) part flexes medially and rotates arm
Acromial (middle) part abducts arm
Spinal ( posterior) extends and laterally rotates arm
What nerve innervates the deltoid
Axillary nerve (C5- C6)
What are the attatchments of the deltoid
PA clavicle acromion and spine of scapula
DA deltoid tuberosity of humerus
Pectoralis major purposeful action
PA reaching across the body into an overhead cabinet putting on a seat belt
Pectoralis major muscular action
Humerus adductor and IR
Scapular protractor
Arm Horizontal Adduction
Attatchments of the pectoralis major
PA Clavicular head to clavicle
PA Sternocostal head
Sternum costal cartilage 1-6
External oblique muscle
DA lateral lip of intertubercular sulcus of humerus
Innervation of pectoralis major
Lateral and medial pectoral nerves
Clavicular head (C5-C6)
Sternolcostal head (C7-C8 T1)
Pectoralis minor purposeful activities
Taking a deep breath, walking on crutches
Pectoralis minor muscular activities
Scapular protraction
The scapula fixed
Assist in elevating the thorax during forced inhalation
Pectoralis minor attatchments
PA 3,4,5, ribs near their costal cartilage
DA coracoid process
Innervation of pectoralis minor attatchments
Medial pectoral nerve
(C8 T1)
Lateral pectoralis nerve (variable)
Infraspinatus purposeful activity
Playing racket sports or table tennis
Infraspinatus muscular activity
Externally rotate the shoulder
(GHJ)
Stabilize the head of humerus in glenoid cavity along with the other SITS muscles
Attatchements of infraspinatus
DA greater tubercle of humerus
PA infraspinous fossa
Innervation of infraspinatus
Suprascapular nerve (C5-C6)
Teres minor purposeful action
Toileting and perineal care
Teres major muscular action
Adduct shoulder (GHJ)
Internally Rotate the shoulder (GHJ)
Teres major attatchments
PA posterior surface of inferior angle of the scapula
DA medial lip of intertubercular sulcus of the humerus
Teres major innervation
Lower subscapular nerve
( C5-C6)
Supraspinatus purposeful activity
Painting overhead or washing your head
Supraspinatus muscle activity
Initiates and assits deltoid un abduction of arm
Stabilize the head of humerus in glenoid cavity along with the other SITS muscles
Supraspinatus attatchments
PA Supraspinous fossa of scapula
DA greater tubercle of humerus
Supraspinatus innervation
Suprascapular (C4,C5,C6)
Teres minor purposeful action
Washing the back of the head and neck
Teres minor muscular activity
Externally rotate the shoulder (GHJ)
Stabilize the head of humerus in glenoid cavity
Teres minor attatchments
PA Lateral border of the scapula
DA greater tubercle of humerus
Teres minor innervation
Axillary nerve (C5-C6)
Subscapularis purposeful activity
Toileting, donning a bra, or throwing a baseball
Subscapularis muscle activity
Internally rotate the shoulder
Stabilize the head in humerus in glenoid cavity
Subscapularis of innervation
Upper and lower subscapular
(C5,C6,C7)
Subscapularis attatchments
PA subscapular fossa
DA Lesser tuberosity of humerus
Serrated anterior purposeful activity
Pushing open a heavy door
Serratus anterior muscular activity
Protracts the scapula (ST joint)
Upwardly rotates the scapula ( St joint )
Holds it against thoracic wall
Serratus anterior attatchments
PA lateral parts of upper 8 or 9 ribs
DA medial border of scapula
Serratus anterior innervation
Long thoracic nerve (C5,C6,C7)
Sternocleidomastoid muscle action
Unilaterally
Neck Unilaterally laterally flexion
Neck CONTRALATERAL rotation
Bilaterally
Neck extension
OA joints
Cervical vertebrae flexion
Superior cervical vertebrae extension with inferior vertebrae flexion
With cervical vertebrae fixed…manubrium and medial clavicle elevation
Sternocleidomastoid innervation
Spinal accessory (CN XI)
Ventral rami (C3-C4)
Pain and proprioception
Sternocleidomastoid purposeful action
Watching an athletic event socializing and driving
Sternocleidomastoid attatchments
SA mastoid process and superior nuchal line
IA sternal head manubrium of sternum
IA clavicular head medial third of clavicle
Platysma purposeful action
Facial expresion
Platysma muscular action
Draws corner of mouth inferiorly and widens it
Draws skin of neck superiorly when teeth are clenched
Platysma innervation
Cervical branch of facial nerve
(CN VII)
Platysma attatchements
SA inferior border of mandible
Skin and subcutaneous tissues of lower face
IA pectoralis major and deltoid
