Upper Appendicular - Arm Muscles Flashcards
Terms used to describe muscles
Brevis
Refers to short
Terms used to describe muscles
Longus
Refers to long
Terms used to describe muscles
Bi
Refers to two
Terms used to describe muscles
Tri
Refers to three
Terms used to describe muscles
Carpi
Means to grasp
Terms used to describe muscles
Teres
Refers to small or cylindrical
Terms used to describe muscles
Pollicis
Refers to the pollex
Terms used to describe muscles
Minimi
Refers to small
Terms used to describe muscles
Digiti
Refers to the digits
Terms used to describe muscles
Retinaculum
Latin for “like a halter”
Terms used to describe muscles
Flexor
Flexion at a joint
Terms used to describe muscles
Extensor
Extension at a joint
Terms used to describe muscles
Pronator
Pronation of the antebrachium
Terms used to describe muscles
Supinator
Supination of the antebrachium
Anterior Brachial Muscles
Biceps brachii
Two origins of this muscle but they merge to form one insertion
-Short head: this is the medial head of the biceps brachii, originates on the coracoid process
-Long head: This is the lateral head of the biceps brachii, originates on the superior rim of the glenoid fossa
-Insertion for both: radial tuberosity
Anterior Brachial Muscles
Brachialis
Deep to the biceps brachii
Anterior Brachial Muscles
Coracobrachialis
Deep and little medial to the short of the biceps brachii
Origin: coracoid process
Insertion: medial margin of the humerus
Posterior Brachial Muscles
Triceps brachii
Three origins of this muscle but they merge to form one insertion
Lateral head: This is the lateral head of the triceps brachii, and it’s origin is the lateral margin of the humerus
Long head: this is medial to the lateral head of the triceps brachii, origin is the inferior rim of the glenoid fossa.
Medial head: This is deep to the lateral and long head of the triceps brachii, origin is the posterior humerus
Ins**ertion: Olecranon process
Anterior Antebrachial Muscles
Palmaris longus
Center of the antebrachium with a tendon extending to the palm
Anterior Antebrachial Muscles
Flexor digitorum superficialis
Deep to the palmaris longus
Anterior Antebrachial Muscles
Felxor carpi ulnaris
Medial to the palmaris longus
Anterior Antebrachial Muscles
Flexor carpi radialis
Lateral to the palmaris longus
Anterior Antebrachial Muscles
Brachioradialis
Lateral to the flexor carpi radialis located on the lateral edge of the radius
Origin: superior to the lateral epicondyle of humerus
Insertion: styloid process of the radius
Anterior Antebrachial Muscles
Pronator teres
An oblique muscles located in the antecubital region extending from the medial epicondyle of the humerus to the midlateral surface of the radius
Anterior Antebrachial Muscles
Pronator quadratus
Transverse muscle located near the carpal region between the radius and ulna
Anterior Antebrachial Muscles
Flexor retinaculum
not a muscle
This is a transverse band of connective tissue surrounding the carpal region on the anterior side, it stabilizes the tendons in the carpal region
Posterior Antebrachial Muscles
Extensor digitorum
Center of the posterior antebrachium, which extends near the center of the carpal region to the digits, two through five.
Posterior Antebrachial Muscles
Extensor carpi ulnaris
Medial to the extensor digitorum
Posterior Antebrachial Muscles
Extensor digiti minimi
Located between the extensor digitorum and the extensor carpi ulnaris
Posterior Antebrachial Muscles
Extensor carpi radialis brevis
Lateral to the extensor digitorum sitting a bit deep
Posterior Antebrachial Muscles
Extensor carpi radialis longus
Lateral to the extensor carpi radialis brevis
Posterior Antebrachial Muscles
Brachioradialis
Lateral to the extensor carpi radialis longus, located on the lateral edge of the radius
Posterior Antebrachial Muscles
Anconeus
Located in the olecranon area, extending obliquely from the lateral epicondyle of the humerus to the olecranon
Posterior Antebrachial Muscles
Supinator
Deep to the anconeus extending from the lateral epicondyle of the humerus to an area distal to the radial tuberosity
Posterior Antebrachial Muscles
Abductor pollicis longus
An oblique muscle that is superior to the extensor pollicis brevis and is found deep and lateral to the extensor digitorum
Insertion: metacarpal I
Posterior Antebrachial Muscles
Extensor pollicis brevis
An oblique muscle that is inferior to the abductor pollicis longus and is found deep and lateral to the extensor digitorum
Insertion: Proximal phalanx of the pollex
Posterior Antebrachial Muscles
Extensor retinaculum
Not a muscle
This is a transverse band of connective tissue surrounding the carpal region on the posterior side, it stabilizes the tendons in the carpal region
Thenar muscles - Metatarsal I muscles
Abductor pollicis brevis
The most lateral muscle of the hand
Thenar muscles - Metatarsal I muscles
Flexor pollicis brevis
Medial to the abductor pollicis brevis
Thenar muscles - Metatarsal I muscles
Opponens pollicis
Deep to the abductor pollicis brevis and the flexor pollicis brevis
Hypothenar muscles - Metatarsal V muscles
Abductor digiti minimi
The most medial muscle of the hand
Hypothenar muscles - Metatarsal V muscles
Flexor digiti minimi
Lateral to the abductor digiti minimi
Hypothenar muscles - Metatarsal V muscles
Opponens digiti minimi
Lateral to the flexor digiti minimi
Rotator cuff muscles
Supraspinatus
Located superior to the spine of the scapula in the supraspinous fossa
Rotator cuff muscles
Infraspinatus
Located inferior to the spine of the scapula in the infraspinous fossa
Rotator cuff muscles
Teres minor
Originates on the lateral border of the scapula, inferior to the infraspinatus muscle
Rotator cuff muscles
Subscapularis
Located in the subscapular fossa of the scapula