A and P exam 2 Flashcards
Where does the spinal cord begin and end?
MO to L1-L2
Role of norepinephrine and acetylcholine in the sympathetic and parasympathetic nervous systems.
Parasympathetic: Acetylcholine is responsible for most of the transmissions.
Sympathetic: acetylcholine transmits until the final nerve to target organ; here is conveyed by norepinephrine most of the time.
How many sympathetic ganglia are cervical?
3 which process info from eyes, glands in the head and neck and heart
How many sympathetic ganglia are thoracic?
12
Which nerve roots make up the cervical plexus? What is their function?
C1-C4. These nerves innervate the back of the head and some of the neck muscles.
Which nerve roots make up the brachial plexus?
C5-8 andT1
Axillary nerve: what are its roots and which muscles do they innervate?
C5-C6. Muscles: deltoid, teres minor
Musculocutaneous nerve: what are its roots and what muscles does it innervate?
Roots: C5, C6, C7
Muscles: biceps, brachialis, coracobrachilais
Median nerve: roots? muscles it innervates?
Roots: C5-T1
Muscles: flexors of forearm, wrist, thumb, index finger and half of ring finger, wrist, finger and thumb flexion
radial nerve: roots? muscles it innervates?
Roots: C5-T1
Muscles: triceps, dorsiflexion of wrist, forearm and finger extensors, extensors of wrist and hand
ulnar nerve: roots? muscles it innervates?
Roots: C8, T1
Muscles: Flexors on ulnar side of the hand and forearm, flexion of wrist and fingers on the ulnar side
What do the posterior branches of the thoracic nerves innervate?
Muscles of the back
What do the anterior branches of the thoracic nerves innervate?
the intercostal muscles
Which spinal roots are included in the lumbar plexus? What does it supply in general? Name two of its nerves and what muscles they innervate.
T12-L4
the lower abdomen
Obturator nerve here, powers the hip adductors and gracilis muscle
Femoral nerve: powers the iliopsoas and the quadriceps muscles
What are the roots for the sacral plexus? What does it provide, in general? Name three of its nerves
L4 through S2
In general, provides some of the innervation for the pelvic floor.
Superior and inferior gluteal nerves, sciatic nerve
What are the nerve roots for the superior gluteal nerve? the inferior gluteal nerve?
Superior? L4, L5, S1
Inferior? L5, S1, S2
What are the nerve roots for Sciatic nerve? what are the areas and muscles innervated?
L4, L5, S1, S2, S3
Hamstrings
Tibial side: gastrocnemius/soleus, posterior tib, long toe flexors, muscles of the foot
Fibular side: peroneals, anterior tib, foor and toe extensor
Name the key dermatomes and what areas they innervate
C5: Deltoid area of arm C6: thumb area C7: middle finger C8: ring finger T4: across the sternum T10: across belly button L3: thigh area L4: knee to inner calf L5: top of foot S1: top of toes
Areas of the tongue and their corresponding tastes
sour: lateral
Salty and sweet: anterior portion
Bitter: posterior portion
The capitellum of the humerus articulates with what?
the head of the radius
Name the carpal bones in order left to right starting proximal
Scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
which carpal bone does radius articulate with?
scaphoid and lunate
Action of the rhomboids
retraction and adduction
what are the muscles of the rotator cuff?
subscapularis, supraspinatus, infraspinatus, teres minor
Supscapularis: origin, insertion, and action
O: Supscapular fossa of scapula
I: lesser tuberosity of the humerus
A: internal rotation
Supraspinatus: Origin, insertion and action
O: supraspinous fossa
I: Greater tuberosity (humerus)
A: abduction
Infraspinatus: Origin, insertion, and action
O: Infraspinous fossa
I: greater tuberosity (humerus)
A: external rotation
teres minor: Origin, insertion and action
O: lateral border of scapula
I: greater tuberosity of humerus
A; External rotation weak adduction
coracobrachialis: origin, insertion and action
O: coracoid process of scapula
I: mid medial surface of humerus
A: flexion of arm
What are the muscles of supination
biceps, brachioradialis
biceps: Origin, insertion and action
O: supraglenoid tubercle of scapula (long head), coracoid process of scapula (short head)
I: radial tuberosity of radius
A: flexion and supination