Lecture 8 Flashcards
superficial muscles that run from ribs and vertebral column to shoulder girdle
extrinsic muscles
yeah
Pec Minor
Subscapularis
Coracobrachialis
Serratus Anterior
Biceps brachii
Pectoralis Major
Deltoid
clinically manifested as paresthesias in the hand/fingers from an impingement of the brachial plexus
pectoralis minor is involved in thoracic outlet syndromes [TOS]
tingling feelings
paresthesias
Sternocleidomastoid
numbness/no feeling
anasthesias
weak serratus anterior is manifested
winging of the scapula
Pectoralis Minor
Trapezius (upper, lower, mid)
Rhomboid Major
Rhomboid minor
Latissimus dorsi
Levator Scapula
Supraspinatus
Infraspinatus
Teres Minor
Teres Major
Tricepts Brachii
-Lateral Head
-Long Head
-Medial Head
Four rotator cuff muscles
-Brachialis
-Brachio-Radialis
Anconeous
Rotator Cuff muscle actions
Posterior, external rotator (ER) at 90 degrees of abduction
Supraspinatus
Rotator Cuff muscle actions
Posterior, ER
infraspinatus
Rotator Cuff muscle actions
Anterior, internal rotation
Subscapularis
Rotator Cuff muscle actions
Posterior, external rotation
Teres Minor
major function of ALL the rotator cuff muscles working together
to stabilize and center the head of the humerus in the glenoid fossa during all shoulder movements
Prime mover of elbow extension
triceps brachii
Anconeous is very weakl synergist
elbow flexion prime mover
brachialis and biceps brachii
brachioradialis acts as synergist
Shoulder abduction prime mover
deltoid
Spinal nerve for biceps brachii
C5
Spinal nerve for brachioradialis
C6
Spinal nerve for triceps brachii
C7
the two functional forearm muscle groups are:
- those that cause wrist movement
- those that move the fingers and the thumb
Flexor digitorum superficialis
Flexor carpi ulnaris
Palmaris Longus
Flexor carpi radialis
Pronator quadratus
Felxor pillicis longus
Brachio-radialis
Pronator teres
pronator quadratus
Flexor pillicis longus
Flexor digitorum
Extensor carpi radialis longus
Supinator
Origin, Insertion and Action of anterior compartment forearm muscles
O: medial epicondyle
I: carpals, metacarpals, or phalanges
A: flexors
Origin, Insertion and Action of posterior compartment forearm muscles
Medial epicondylitis
“golfers elbow”
Extensor pollicis longus
Extensor pollicis brevis
Extensor pollicis abductor
Extensor digitorum
Extensor carpi radialis brevis
Extensor carpi radialis longus
Extensor indicis
Extensor carpi ulnaris
Posterior compartment forearm muscle O, I, A
O: lateral epicondyle
I: carpals, metacarpals, or phalanges
A: extensors
Three functional groups of intrinsic hand muscles
Thenar, hypothenar, mid-palm
Three types of short muscles on the hand
Lumbricals (flex MCP and extend IP on each finger)
Palmar interossei (ADduct fingers)
Dorsal interossei (ABduct fingers)
Palmar interossei (ADduct fingers)
Dorsal interossei (ABduct fingers)
Flexion
Extension
Adduction
Abduction
Back toward midline of body
adduction
away from midline of body
abduction
anterior compartment muscles of hip and thight do what
flex the hip and extend the knee
posterior compartment muscles of hip and thigh
extend the hip and flex the knee
medial compartment of thigh
all adduct the hip
Cross section of thigh, drink it in
what compartment?
Sartorious and quadricepts
anterior compartment
nerve of anterior compartment
femoral nerve
what compartment?
hamstrings
posterior compartment
nerve of posterior compartment
sciatic nerve (tibial and peroneal)
Medial compartment muscles
adductor magnus
pectineus* [femoral nerve]
adductor longus
gracilis
adductor brevis
What’s stronger, one-joint muscle or two-joint muscle?
one joint
Prime mover for hip flexion
iliopsoas
Show muscle of hip flexion
rectus femoris
Prime mover of hip extension
gluteus maximus
Prime mover of hip extension
gluteus maximus
Iliopsoas muscles
Psoas major
Iliacus
Pectineus
Sartorius
Adductor longus
tensor fasciae latae
Rectus femoris
Vastus lateralis
Vastus medialis
Adductor longus
Gracilis
Adductor magnus
Note vastus intermedialis
Gluteus medius
Gluteus maximus
hamstrings
Biceps Femoris (long, short head)
Semitendinosus
Semimembranosus
Prime mover of external rotation of femur
Piriformis
Piriformis
Three important muscles attaching to greater trochanter
- gluteus medius
- gluteus minimus
- piriformis
External rotator support muscles
GOGO
superior gemellus
obturator internus
inferior gemellus
obturator externus
Posterior compartment of thigh
flex knee and extend the hip
anterior compartment of thigh
extend the knee and flex hip
medial comparment
adduct the hip
sole extensor of knee joint
quadriceps femoris
knee flexor muscles
hamstrings
lateral muscles of hamstring
biceps femoris
medial muscles of hamstring
semitendinosus
Semimembranosus
Quads nerve
L4
Hammies nerve
L5
achilles tendon nerve
S1
Peep how fascia separates lower leg compartments
Fibularis longus
tibia
gastrocnemius
tibialis anterior
extensor digitorum longus
soleus
extensor hallucis longus
fibularis tertius
these muscles evert the foot and assist plantarflexion (DOG SHIT MUSCLES)
− peroneus longus [fibularis longus]
− peroneus brevis [fibularis brevis]
plantarflexion muscles
Go: Soleus
Show: gastroc
Superficial posterior compartment
deep muscles of posterior compartment
prime mover for inversion
fibularis longus
dorsiflex the foot and extend the toes
anterior compartment
plantarflex the foot and flex the toes
posterior compart
evert and plantarflex the foot
lateral compartment
issue with inflammation between layers of fascia
compartment syndrome
compartment syndrome relieved by
fasciotomy
one muscle on dorsal aspect of foot
extensor digitorum brevis
what does the plantar interossei do?
ADduct
what does the dorsal interossei do?
ABduct
