Final Exam (Palpation) Muscles Flashcards
Brachialis - Innervation
musculocutaneous and small branch of radial nerve
Brachialis - Origin
the distal 1/2 of the anterior surface of the humerus
Brachialis - Insertion
tuberosity and coronoid process of the ulna
Brachialis - Actions
FLEX the elbow at the humeroulnar joint
Glute Max - Innervation
Inferior gluteal nerve (L5, S1, S2)
Glute Max - Origin
Coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments
Glute Max - Insertion
Upper fibers: Iliotibial tract
Lower fibers: gluteal tuberosity
Glute Max - Actions
EXTEND
LATERALLY ROTATE
ABDUCT
The coxal joint
Lower fibers: ADDUCT the coxal joint
Glute Med - Innervation
Superior gluteal nerve, L4, L5, and S1
Glute Med - Origin
Gluteal surface of the ilium,
Between posterior and anterior gluteal lines,
Just below iliac crest
Glute Med - Insertion
Lateral aspect of greater trochanter
Glute Med - Actions
All Fibers: ABDUCT the coxal joint
Posterior fibers:
EXTEND, LATERALLY ROTATE the coxal joint
Anterior fibers:
FLEX, MEDIALLY ROTATE the coxal joint
Coracobrachialis - Innervation
musculocutaneous nerve
Coracobrachialis - Origin
coracoid process of the scapula
Coracobrachialis - Insertion
medial surface of the mid-humeral shaft
Coracobrachialis - Actions
FLEX glenohumeral
ADDUCT glenohumeral
Brachioradialis - Innervation
radial nerve
Brachioradialis - Origin
proximal 2/3 of the lateral supracondylar ridge of he humerus
Brachioradialis - Insertion
styloid process of the radius
Brachioradialis - Actions
FLEX elbow at humeroulnar jt
assist to PRONATE and SUPINATE the forearm when these movements are resisted
Pronator Teres - Innervation
median nerve
Pronator Teres - Origin
common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna
Pronator Teres - Insertion
middle of the lateral surface of the radius
Pronator Teres - Actions
PRONATE the forearm at the radioulnar joints
assist to FLEX the elbow at the humeroulnar joint
ECRL - Innervation
radial nerve
ECRL - Origin
distal 1/3 of lateral supracondylar ridge of the humerus
ECRL - Insertion
base of the 2nd metacarpal
ECRL - Actions
EXTENDS and ABDUCTS the wrist at radiocarpal joint
assist to FLEX the elbow at humeroulnar joint
ECRB - Innervation
radial nerve
ECRB - Origin
common extensor tendon from the lateral epicondyle of the humerus
ECRB - Insertion
base of 3rd metacarpal
ECRB - Actions
ABDUCT and EXTEND the wrist at radiocarpal joint
assist to FLEX the elbow at humeroulnar joint
Supinator - Innervation
radial nerve
Supinator - Origin
- lateral epicondyle of the humerus
- radial collateral ligament
- annular ligament
- supinator crest of the ulna
Supinator - Insertion
anterior, lateral surface of proximal 1/3 of radial shaft
Supinator - Actions
SUPINATES the forearm at the radioulnar joints
Abductor Pollicis Longus - Innervation
radial nerve
Abductor Pollicis Longus - Origin
posterior surface of radius, ulna, and interosseous membrane
Abductor Pollicis Longus - Insertion
base of 1st metacarpal
Abductor Pollicis Longus - Actions
ABDUCTS and EXTENDS the thumb at carpometacarpal jt
ABDUCTS (RADIALLY DEVIATES) the wrist at radiocarpal jt
forms the anterior border of the anatomical snuff box
Internal Obliques - Innervation
T7-L1,
iliohypogastric nerve and the ilioinguinal nerve, ventral divisions
Internal Obliques - Origin
lateral inguinal ligament,
iliac crest,
thoracolumbar fascia
Internal Obliques - Insertion
internal surfaces of the lower 3 ribs,
rectus sheath to the linea alba
Internal Obliques - Actions
FLEX, LATERALLY FLEX, and ROTATE vertebral column to the same side,
COMPRESS the abdominal contents
Rectus Abdominis - Innervation
T5-T12, ventral rami
Rectus Abdominis - Origin
pubic crest
pubic symphysis
Rectus Abdominis - Insertion
cartilage of ribs 5-7
xiphoid process
Rectus Abdominis - Actions
FLEX the vertebral column
TILT pelvis POSTERIORLY
Iliacus - Innervation
Femoral nerve
Iliacus - Origin
Iliac fossa
Iliacus - Insertion
Lesser trochanter
Iliacus - Actions
With origin fixed:
FLEX the coxal joint
May LATERALLY FLEX the coxal joint
With insertion fixed:
FLEX the trunk toward the thigh
TILT the pelvis ANTERIORLY
Psoas Major - Innervation
Lumbar plexus
Psoas Major - Origin
Bodies and transverse processes of lumbar vertebrae
Psoas Major - Insertion
Lesser trochanter
Psoas Major - Actions
With origin fixed:
FLEX the coxal joint
May LATERALLY ROTATE coxal joint
With insertion fixed:
FLEX the trunk toward the thigh
TILT the pelvis ANTERIORLY
Unilaterally: assist to LATERALLY FLEX the lumbar spine
Piriformis - Innervation
Sacral plexus
Piriformis - Origin
Anterior surface of sacrum
Piriformis - Insertion
Superior aspect of greater trochanter
Piriformis - Actions
LATERALLY ROTATE the coxal joint
ABDUCT the coxal joint when the hip is flexed
Masseter - Innervation
trigeminal nerve (CN V) mandibular division
Masseter - Origin
Zygomatic arch
Masseter - Insertion
angle and ramus of mandible
Masseter - Actions
ELEVATE TMJ
may assist to PROTRACT TMJ