Podcast
Questions and Answers
What is the origin of the Flexor carpi radialis muscle?
What is the origin of the Flexor carpi radialis muscle?
How many muscles are in the superficial group of the anterior or flexor muscles of the forearm?
How many muscles are in the superficial group of the anterior or flexor muscles of the forearm?
What is the insertion of the Pronator teres muscle?
What is the insertion of the Pronator teres muscle?
What percentage of people are born without the Palmaris longus muscle?
What percentage of people are born without the Palmaris longus muscle?
Signup and view all the answers
What is the origin of the Flexor pollicis longus muscle?
What is the origin of the Flexor pollicis longus muscle?
Signup and view all the answers
What is the insertion of the Flexor digitorum profundus muscle?
What is the insertion of the Flexor digitorum profundus muscle?
Signup and view all the answers
How many muscles are in the deep group of the anterior or flexor muscles of the forearm?
How many muscles are in the deep group of the anterior or flexor muscles of the forearm?
Signup and view all the answers
What is the insertion of the Pronator quadratus muscle?
What is the insertion of the Pronator quadratus muscle?
Signup and view all the answers
What is the action of the lumbricales muscles on the phalanges?
What is the action of the lumbricales muscles on the phalanges?
Signup and view all the answers
How many dorsal interossei muscles are there in the hand?
How many dorsal interossei muscles are there in the hand?
Signup and view all the answers
What is the nerve supply of the interossei muscles?
What is the nerve supply of the interossei muscles?
Signup and view all the answers
What is the action of the palmar interossei muscles on the fingers?
What is the action of the palmar interossei muscles on the fingers?
Signup and view all the answers
What is the function of the pectoralis major muscle in the upper limb?
What is the function of the pectoralis major muscle in the upper limb?
Signup and view all the answers
Which muscle is responsible for flexing the wrist and medial 1/2 of flexor digitorum profundus?
Which muscle is responsible for flexing the wrist and medial 1/2 of flexor digitorum profundus?
Signup and view all the answers
How many phalanges are present in the fingers of the hand, excluding the thumb?
How many phalanges are present in the fingers of the hand, excluding the thumb?
Signup and view all the answers
What is the shape of the body of the ulna in the upper 3/4?
What is the shape of the body of the ulna in the upper 3/4?
Signup and view all the answers
What is the result of a lesion of the median nerve?
What is the result of a lesion of the median nerve?
Signup and view all the answers
How many muscles are present in the pectoral region of the shoulder?
How many muscles are present in the pectoral region of the shoulder?
Signup and view all the answers
How many muscles are supplied by the ulnar nerve in the upper limb?
How many muscles are supplied by the ulnar nerve in the upper limb?
Signup and view all the answers
What is the name of the concave surface on the lateral side of the coronoid process of the ulna?
What is the name of the concave surface on the lateral side of the coronoid process of the ulna?
Signup and view all the answers
What is the result of a lesion of both the ulnar and median nerves?
What is the result of a lesion of both the ulnar and median nerves?
Signup and view all the answers
How many carpal bones are present in the proximal row of the wrist?
How many carpal bones are present in the proximal row of the wrist?
Signup and view all the answers
What is the name of the muscle that connects the clavicle to the scapula?
What is the name of the muscle that connects the clavicle to the scapula?
Signup and view all the answers
What is the name of the process that projects medially and below the head of the ulna?
What is the name of the process that projects medially and below the head of the ulna?
Signup and view all the answers
Study Notes
Upper Limb Bones
- Radial notch: a concave surface on the lateral side of the coronoid process that articulates with the head of the radius to form the superior radio-ulnar joint.
- Ulna body: triangular in the upper ¾ and cylindrical in the lower ¼.
- Lower end of ulna:
- Head: small and rounded, articulating with the medial side of the lower end of the radius to form the inferior radio-ulnar joint.
- Styloid process: projects medially and below the head.
Bones of the Hand
- 27 bones in total, consisting of:
- Carpal bones: 8 in number, arranged in 2 rows (proximal and distal).
- Metacarpal bones: 5 in number, one for each finger.
- Phalanges: 14 in number, with 3 in each finger (proximal, middle, and distal) except the thumb, which has only 2 (proximal and distal).
Muscles of the Upper Limb
Muscles of the Shoulder Region
- 15 muscles divided into 3 groups:
- Muscles of the pectoral region:
- Pectoralis major: originates from the clavicle and sternum, inserts into the lateral lip of the bicipital groove of the humerus, and flexes and adducts the arm while medially rotating it.
- Other muscles in this group include pectoralis minor, serratus anterior, and subclavius.
- Muscles of the pectoral region:
Muscles of the Hand
- Interossei:
- 4 dorsal interossei muscles: occupy the intervals between the metacarpal bones and are bipenniform muscles.
- 3 or 4 palmar interossei muscles: smaller and placed on the palmar surfaces of the metacarpal bones.
- All interossei muscles are supplied by the ulnar nerve.
- Action of the interossei:
- Palmar interossei: adduct the fingers to an imaginary line drawn longitudinally through the center of the middle finger.
- Dorsal interossei: abduct the fingers from that line.
Nerve Supply
- Ulnar nerve (C.8 and T.1) is motor to 15 ½ muscles:
- 1 ½ muscles in the front of the forearm.
- 14 short muscles in the hand.
- Median nerve (C.5, 6, 7, 8, and T.1) is motor to 12 ½ muscles:
- 6 ½ muscles in the front of the forearm.
- 6 short muscles in the hand.
Muscles of the Forearm
- Anterior or flexor muscles: 8 in number, consisting of:
- Superficial group: 5 muscles, including pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, and flexor digitorum superficialis.
- Deep group: 3 muscles, including flexor digitorum profundus, flexor pollicis longus, and pronator quadratus.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the structure and features of the ulna bone, including the radial notch, body, and lower end components.
