Exam 1 Flashcards
Sagittal plane
Dividing the midline (face) in half
Parasaggital
dividing the midline, but away from center
Coronal/frontal
Perpendicular to sagittal, divides the side in half
Transverse/Axial/Horiziontal
Divides the body in to top and bottom.
Pronation
Rotating hand so that palm is now facing down
Supination
Rotating the hand so that the palm is now facing up.
Definition of back:
Body from base of sKull to illac crest
Where is the superior angle of scapula?
T1-T2
Where is the inferior angle of Scapula?
T7
Where is the illiac crest located in reference to the spine?
T7
Erector Spinae
Innervation: Dorsal Rami of spinal nerves
Function: keeping erect posture
Thoracolumbar Fascia
Continous with aponeurosis of Latissimus Dorsi
Muscles of the back acting on ribs for respiration
Serratus posterior superior
Serratus posterior inferior
Suboccipital Triangle
Borders: Rectus capitis posterior major Obliquus capitis superior Obliquus capitis inferior Contents: Suboccipital nerve Vertebral artery
Trapezius
Innervation: CN XI
Origin: C7-T12, External occipital protuberance
Insertion: Lateral clavicle, Acromion, Spine of Scapula
Action: Elevates, Retracts, Depresses, and rotates scapula upward
Latissimus Dorsi
Innervation: Thoracodorsal
Origin: T7-L5, Iliac crest
Insertion: Intertubular groove of humerus
Action: Extends, adducts, and medially rotates humerous
Serratus Anterior
Innervation: Long Thoracic
Origin: Upper 8 ribs
Insertion: Medial border of scapula
Action: Rotate scapula upward, pulls toward anterior thoracic wall (retraction)
Greater Occipital nerve
Origin: C2
SMB: Sensory
Innervation: Upper half of skin in back
Thoracodorsal
Origin: C6, C7, C8
Long thoracic
Origin: C5, C6, C7
Dorsal Scapular
Origin: C5
Rhomboid Minor
Innervation: Dorsal scapular
Origin:Minor: C7-T1.
Insertion: Medial border of Scapula
Action: Retract scapula
Rhomboid Major
Innervation: Dorsal scapular
Origin: Major: T2-T5
Insertion: Medial border of Scapula
Action: Retract scapula
Triangle of auscultation
Borders: Trapezius Latissimus dorsi Scapula Contents:
Triangular Space
Borders: Teres Major Teres Minor Long head of Triceps Contents: Scapular Circumflex artery
Lumbar Triangle
Borders: Latissimus dorsi External Abdominal Oblique Illium Floor: internal abdominal oblique (herniations occur often here)
Quadrangular space
Borders: Teres Major Teres Minor Long head of triceps Humerus Contents: Axillary nerve Posterior Circumflex humeral artery
Cervical Vertebrae
C1(Atlas): no body or spinous process. C2: Dens, bifid SP C3-C7: Bifid SP, Transverse foramen, C7: LOOONG spinous process Facets: superior and inferior facing
Thoracic Vertebrae
Costal facets (articulation with ribs, on transverse process and body) Posterior facing articular process Spinous process points down
Lumbar Vertebrae
Long, slender transverse process
Accessory processes
Articular facets face medially
Sacral Vertebrae
Fused
Articulate with coxal bones
Coccygeal vertebrae
4
Intervertebral discs
C2-L5
Annulus fibrosus
Nucleus pulposus
Primary Curvature
Thoracic (anteriorly)
Sacral (anteriorly)
Secondary Curvatures
Cervical (posteriorly)
Lumbar (posteriorly)
Kyphosis
Exaggerated primary (hunch back)
Lordosis
Exaggerated secondary (swayback)
Scoliosis
Lateral deviation of lumbar collumn
Spine ligaments from Anterior to posterior
Anterior longitudinal Posterior longitudinal Ligamentum flavum Interspinous Supraspinous
Dentate ligaments
Lateral extensions of Pia mater
Makes the filum terminal internum
Deep fascia
Pectoral Fascia
Axillary Fascia
Clavicpectoral fascia
Suprascapular Notch
Suprascapular Artery and nerve (Army over Navy under/Anybody over Notre Dame)
Triangular Interval
Border: Teres Major long head of triceps lateral head of triceps contents: Profunda brachii Radial nerve
Pectoral Fascia
Superior border: clavicle + sternum
Inferior: Fascia of abdominal wall
Invests into pectoralis major
Axillary Fascia
Continuous with Pectoral fascia laterally
Forms floor of axilla
Clavipectoral
Deep to Pec. Major
Comes from clavicle
Encloses subclavius and pec minor
becomes supensory ligament of axilla
Dermatones C5
Clavicles
Dermatones T4
Level of niples
Dermatone T10
Level of umbilicus
Dermatone T1
Goes down medial/center part of arm
Supraclavicular nerve
Origin: C3-C4
Location:anterior to clavicle
Supplies skin of clavicle
Superior Lateral Brachial Cutaneous nerve
Origin: C5-C6
Cutaneous branch of Axillary nerve
Supplies skin over deltoid
Clavicle Attachments
Superior surface: Sternocleidomastoid Trapezius Deltoid Subclavius
Pectoralis Major
Innervation: Lateral and Medial pectoral nerve
Origin: Medial clavicle, sternum
Insertion: Intertubercular groove of humerus
Action: Adductor and medial rotator of humerus
Key: two heads
Pectoralis Minor
Innervation: Medial pectoral nerve
Origin: Ribs 3-5
Insertion: Coracoid process
Action: Depress and protract scapula
Subclavius Muscle
Innervation: Subclavius nerve
Origin: First rib
Insertion: Clavicle (inf.)
Action: Stabilize clavicle
Deltoid Muscle
Innervation: Axillary nerve
Origin: Lateral third of clavicle, acromion, spine of scapula
Insertion: Deltoid tuberosity
Action: Anterior: Flex and medially rotate arm. Middle: Abducts arm (top 85%). Posterior: Extends and laterally rotates arm
Teres Major
Innervation: Lower subscapular nerve
Origin: Inferior border of scapula
Insertion: Intertubercular groove of humerus
Action: Adducts arm. Medially rotates shoulder.
Teres Minor
Innervation: Axillary nerve
Origin: Lateral border of scapula
Insertion: Greater tubercle of humerus
Action: Laterally rotates arm. Holds humerus in glenoid cavity
Rotator cuff muscles
SItS Supraspinatus Infraspinatus Teres minor Subscapularis
Supraspinatus
Innervation: Suprascapular nerve Origin: Supraspinous fossa Insertion: Greater tubercle Action: Helps adduct arm w/ Deltoid (bottom 15%) Rotator cuff muscle
Infraspinatus
Innervation: Suprascapular nerve Origin: Infraspinous fossa Insertion: Greater tubercle Action: Lateral rotation of arm. Holds Humerus in glenoid cavity. Rotator cuff muscle
Subscapularis
Innervation: Subscapular nerve (upper and lower) Origin: Subscapular fossa Insertion: Lesser tubercle Action: Medial rotation of the arm Rotator cuff muscle
Axilla
Contents: Axillary Artery Lateral Cord Posterior Cord Medial Cord Axillary lymph nodes
Axillary Artery Branches
From: Subclavian
Becomes: Brachial Artery
Branches:
Part 1 (1): Rib1-Pec minor
Superior thoracic artery
Part 2 (2): Under pec. minor
Thoracoacromial trunk
Lateral Thoracic Artery
Part 3(3): Lat. Pec. Minor to inf. Teres Major.
Subscapular Artery
Anterior Circumflex humeral artery
Posterior Circumflex Humeral artery
Subscapular artery
From the third part of Axillary artery.
Divides into:
Circumflex scapular artery
Thoracodorsal artery.
Posterior Circumflex Humeral Artery
Branch of axillary artery, passes through quadrangular space.
What glands are on the areolae?
Sebaceous glands (glands of Montgomery)
What is the lobule?
Functional unit of the breast tissue.
Drained by single lactiferous duct.
How many individual lobules per breast?
15-20.
What is the suspensory ligament of Cooper?
Gland connecting skin to superficial fascia, separating the glandular tissue.
Arterial supply to breasts?
(medial) Internal Thoracic
Lateral thoracic
Posterior intercostal
Venous drainage of the breast?
Axillary vain
Cutaneous innervation of breasts
4th to 6th intercostal nerves.
Lymphatic drainage of breasts
Has role in metastasis.
Most lymph drains to the axillary lymph notes.
CLASP
Central, lateral, Apical, Subscapular, and Pectoral nodes
Frequency of breast cancer in breast
Superior lateral > areolar. Superior Medial > Inferior lateral > inferior medial
Rectus capitis posterior major
Innervation: Suboccipital (C1)
Origin: Spinous process of axis
Insertion: Inferior nuchal line
Action: Ipsilateral rotation, extension
Rectus Capitis posterior minor
Innervation: Suboccipital nerve
Origin: Posterior arch of atlas
Insertion: Inferior nuchal line
Action: Extension
Obliquus capitis Superior
Innervation: Suboccipital nerve
Origin: Transverse process of atlas
Insertion: Inferior nuchal line
Action: Abduction and extension
Obliquus capitis inferior
Innervation: suboccipital nerve
Origin: Spinous process Axis (C2)
Insertion: Transverse process of atlas (C1)
Action: Rotates head to contracted side.
Transverse suprascapular ligament
Over Great Scapular Notch
Over: Suprascapular artery
Under: Suprascapular nerve
What inserts on greater tubercle?
Supraspinatus (only one that does not laterally rotate)
Infraspinatus
Teres minor
What inserts on lesser tubercle?
Subscapularis
What inserts on intertubercular fossa?
Latissimus Dorsi
Teres Major
Pectoral Major
Anastomosis
Circumflex Scapular Suprascapular artery
Anterior circumflex humeral artery posterior circumflex humeral artery
Screw The Lawyer, Save A Patient
Superior thoracic artery Thoracoacromial artery Lateral thoracic artery Subscapular artery Anterior humeral circumflex artery Posterior humeral circumflex artery
Levator Scapulae
Innervation: Dorsal Scapular nerve
Origin: Transverse process of C1-C3
Insertion: Superior angle of scapula
Action: Elevates scapula, extends head
Serratus posterior superior
Innervation: Intercostal nerves
Origin: Nuchal ligament
Insertion: Ribs 2-5
Action: Elevates ribs (respiration)
Serratus posterior inferior
Innervation: Intercostal nerves
Origin: Vertebrae T11-L2
Insertion: Ribs 9-12)
Action: Depress lower libs (expiration)
Semispinalis capitis
Innervation: Dorsal rami
Action: Extends head
Splenius capitis
Innervation: Dorsal rami
Origin: Transverse process of T6-12
Insertion: Mastoid process
Action: Extends vertebral column, ipsilateral rotation, abduction
What attaches to the coracoid process?
Three muscles:
Pec Minor
Short head of biceps brachii
Coracobrachialis
Triceps Brachii
Innervation: Radial nerve Origin: Long head: Infraglenoid tubercle Lateral head: upper half of humerus Medial head: Posterior shaft of humerus Insertion: olecranon process of ulna Action: Long: Adducts arm, extends shoulder Medial and lateral: extend forearm at elbow
Sternocleidomastoid
Innervation: Spinal accessory
Origin:
Sternal head: Manubrium
Clavicular head: Medial 1/3rd of clavicle.
Insertion: Mastoid process
Action:
Abducts/adducts, contralateral rotation, flex neck.
Platysma
Innervation: Facial nerve CN:VII
Origin: Skin over pectoral region
Insertion: Mandible
Action: Depress mandible, tenses lower neck skin.
Omohyoid
Innervation: Ansa Cervicalis Origin:superior scapular border Insertion: Hyoid bone Action: Depresses hyoid and larynx Part of anterior strap.
Anterior scalene
Innervation: C4-C6
Origin: Transverse process of C3-C6/1st rib
Insertion: First rib
Action: Elevates rib, Flex, abduction
Middle Scalene
Innervation: Ventral rami of C3-C8 Origin: Transverse process of all of cervical Insertion: 1st rib Action:Elevates rib for respiration Abduction
Posterior scalene
Innervation: Ventral rami C7-C8
Origin: C5-C7 transverse processes
Insertion:2nd rib
Action: elevates rib for respiration, abduction, ipsilateral rotation .
Investing Layer of dense connective tissue
Attaches to ligamentum nuchae and spinous process of C7
Encloses trapezius and sternocleidomastoid, surrounds everything
Investing Fascia
Invests: Trapezius, Infrahyoid muscles
Pretracheal fascia
Continuous with carotid sheath and buccopharyngeal
Contains: Thyroid, trachea/larynx
Carotid sheath
Contents: Common Carotid artery Internal Carotid artery Vegas nerve Internal jugular
Prevertebral (deep cervical) Fascia
Covers vertebral musculature
Posterior Triangle
Boundaries: Sternocleidomastoid Trapezius Clavicle Floor: Paravertebral Fascia (splenius capitis, levator Scapulae, Scalene Anterior, middle, and posterior) Divides into: Occipital triangle Omoclavicular triangle
Occipital triangle
Borders: Sternocleidomastoid Trapezius Inferior belly of omohyoid Contains: Cervical plexus (cutaneous) Spinal Accessory nerve. Transverse cervical artery
Omoclavicular triangle
Boundaries:
Omohyoid inferior belly, clavicle
Sternocleidomastoid
Sensory branches of cervical plexus (anterior to posterior)
Transverse cervical
Greater aurical
Lesser occipital
Supraclavicular
What is Erb’s point?
The point at which sensory cutaneous nerves from cervical plexus become superficial.
Supraclavicular Triangle
Below omohyoid Contents: Lower part of brachial plexus Subclavian artery + vein Branches off subclavian artery External jugular vein (above Sternocleidomastoid).
Where can you see the external jugular vein?
Below the Sternocleidomastoid, alongside the Great auricular nerve.
Where can you see Phrenic nerve in neck?
Lies on top of the Anterior Scalene
Describe the position of Subclavian vein, Subclavian artery, and the scalene muscles.
Subclavian vein runs superficial to anterior scalene
Subclavian artery runs deep to anterior scalene, but superficial to the middle scalene.
Thyrocervical artery
From: Subclavian Branches: Inferior thyroid Transverse cervical Suprascapular Ascending cervical
ITSA DEEP SUPREME
ITSA (branches of thyrocervical)
Deep + Supreme (branches of costocervical)
Branches of thoracoacromial
Dead People Are Cadavers Deltoid Pectoral Acromial Clavicular
Proximal Subclavian branches
Vertebral
Internal thoracic
Thyrocervical
Medial branches of subclavian
Costocervical
divides into Deep cervical and Supreme thoracic
Biceps Brachii
Innervation: Musculocutaneous (C6 and C7)
Origin:
Long (lateral): supraglenoid tubercle of scapula
Short head: coracoid process
Insertion: Radial tuberosity (bicipital aponeurosis)
Action: Supinates forearm, flexes forearm at elbow, flexes arm at shoulder
Brachialis
Innervation: Musculocutaneous and radial (C7)
Origin: Bottom half of humerus (anterior)
Insertion: Coronoid process in ulna
Action: Flex forearm at elbow
Coracobrachialis
Innervation: Musculocutaneous Origin: Tip coracoid process Insertion: medial middle of humerus Action:Flex and adduct arm at shoulder.
Pronator teres
Innervation: Median
Origin: Medial epicondyle humerus
Insertion: Lateral Radius
Action: Pronates arm, flexes elbow
Flexor carpi radialis
Innervation: Median
Origin: Medial epicondyle, humerus
Insertion: 2nd metacarpal bone
Action: Flexes hand and wrist
Palmaris longus
Innervation: Median
Origin: Medial epicondyle
Insertion: Palmar aponeurosis
Action: Flexes hand at wrist, tightens palmar aponeurosis
Flexor carpi ulnaris
Innervation: Ulnar Origin: Humeral H: medial epicondyle Ulnar H: olecranon process Insertion: 5th metacarpal Action: Flexes/adducts hand
Flexor digitorum superficialis
Innervation: Median
Origin: Medial epicondyle + sup/ant radius
Insertion: middle phalanges on edges (2-5)
Action: flexes middle phalanges 1-4, flexes wrist, flexes forearm
Flexor digitorum profundis
Innervation: Ulnar (medial) and Median (lateral)
Origin: Anterior/medial ulna
Insertion: distal phalanges of metacarpals 1-4 (between F. digitorum superficialis tendons)
Action: Flex distal phalanges, flex wrist.
Flexor pollicis longus
Innervation: Anterior interosseous
Origin: anterior radius
Insertion: base of distal phalanx of thumb
Action: flexes phalanges of 1st digit.
Pronator Quadratus
Innervation: Anterior interosseous
Origin: anterior ulna
Insertion: anterior radius
Action: pronates forearm
Brachioradialis
Innervation: Radial nerve
Origin: Medial humerus
Insertion: Distal/lateral radius
Action: Flexes forearm at elbow
Anconeus
Innervation: Deep Radial (C5-T1)
Origin: Lat. epicondyle, humerus
Insertion: olecranon process
Action: Extend elbow
Extensor carpi radialis longus
Innervation: Radial
Origin: Lat. Humerus
Insertion: Base of metacarpal 2.
Action: Extend and abduct hand
Extensor carpi radialis brevis
Innervation: Radial
Origin: Lateral epicondyle
Insertion: base of metacarpal 3
Action: Extend and abduct hand
Extensor digitorum
Innervation: Posterior interosseous
Origin: Lat. Epicondyle
Insertion: Distal and middle phalanges (post.)
Action: Extend medial 4 digits at MCP joints, extend hand
Extensor digiti minimi
Innervation: Post. Interosseus
Origin: Lat. Epicondyle, humerus
Insertion: Extensor expansion of digit 5
Action: Extend 5th digit at MCP and IP joints
Extensor carpi ulnaris
Innervation: Post. Interosseus
Origin: Lat. epicondyle
Insertion: Base of 5th metacarpal
Action: Extend and adduct hand
Abductor pollicis longus
Innervation: Posterior interosseous
Origin: Post. Ulna, radius, ISM
Insertion: Base of 1st metacarpal
Action: Abduct thumb and extend it at CMC
Extensor pollicis brevis
Innervation: Posterior interosseous
Origin: Post. Radius, ISM
Insertion: Base of proximal phalanx of thumb
Action: extend thumb at CMC joint.
Extensor pollicis longus
Innervation: Post. Interosseus
Origin: Post. Ulna and ISM
Insertion: Distal phalanx of thumb
Action: Extend thumb at MCP and IP joints
Extensor indicis
Innervation: Post. Interosseus
Origin: Post. Ulna, ISM
Insertion: Extensor expansion of 2nd digit
Action: Extends 2nd digit, helps extend hand
Supinator
Innervation: Radial nerve
Origin: Lat. Epicondyle, humerus
Insertion: Lat. radius
Action: Supinates forearm
Opponens Pollicis
Innervation: Median nerve
Origin: Flexor retinaculum
Insertion: lateral side of metacarpal 1
Action: Opposes thumb
Abductor pollicis brevis
Innervation: Median nerve
Origin: Flexor retinaculum
Insertion: Lateral phalanx of thumb
Action: Abducts thumb
Flexor Pollicis brevis
Innervation: Median nerve
Origin: Flexor retinaculum
Insertion: Lat. proximal phalanx of thumb
Action:Flexes proximal phalanx of thumb
Flexor Digiti Minimi Brevis
Innervation: Ulnar nerve
Origin: Flexor retinaculum
Insertion: Proximal phalanx of digit 5
Action: Flexes proximal phalanx of digit 5
Abductor Digiti Minimi
Innervation: Ulnar nerve
Origin: Pisiform
Insertion: Medial side of Phalanx 5
Action: Abducts 5th digit.
Opponens digiti Minimi
Innervation: Ulnar nerve
Origin: Flexor retinaculum, hook of hamate
Insertion: ant. 5th metacarpal
Action: Opposes pinky
Adductor Pollicis
Innervation: Ulnar nerve Origin: Oblique head: 2nd and 3rd metacarpals Transverse head: 3rd metacarpal Insertion: Proximal phalanx of thumb Action: Adduct thumb
Dorsal Interossei
DABS
Innervation: Ulnar
Number: 4
Origin: metatarsal
Insertion: Proximal Phalanx of respective finger
Action: Abducts digits 2, 3 (both ways), 4
Palmaris brevis
Innervation: Ulnar
Action: Draw skin towards center fo palm
Lumbricals
Innervation:
1 and 2: Median nerve
3 and 4: Ulnar nerve
Origin: Flexor Digitorum profundus tendon
Insertion:
Action: Extend proximal and distal interphalangeal joints of 2-5
Palmar Interossei
PAD Innervation: Ulnar Location (3): Between digits Origin: metatarsal of respective finger Insertion: Proximal Phalanx of respective finger Action: Adducts digits 2, 4, 5
Snuff box
Borders: Extensor pollicis longus, Abductor pollicis longus, Extensor pollicis brevis
Contents: Radial artery
Innervated muscles of CNXI
Sternocleidomastoid
Trapezius
Innervated muscles by axillary nerve
Teres minor
Deltoid
Seen in quadrangular space
Innervated by Thoracodorsal
Latissimus dorsi
Innervated by Dorsal Scapular
Levator Scapulae
Rhomboid Major
Rhomboid Minor
Innervated by Long Thoracic
Serratus anterior
Innervated by Suprascapular
Supraspinatus
Infraspinatus
Innervated by Subclavius nerve
Subclavius
Innervated by Lateral Pectoral Nerve
Pectoralis Major
Innervated by Medial Pectoral Nerve
Pectoralis Major
Pectoralis Minor
Innervated by Musculocutaneous
Biceps brachii
Coracobrachialis
Brachialis
Innervated by Upper Subscapular
Subscapularis
Innervated by Lower subscapular
Subscapularis
Teres Major
Innervated by Ulnar
Flexor Carpi Ulnaris Flexor Digitorum Profundus Adductor pollicis Abductor Digiti Minimi Flexor Digiti minimi brevis Opponens digiti minimi Lumbricals 3 and 4 Dorsal Interossei Palmar Interossei Palmar surface of digit 5, and half of 4 (as well as all posterior side behind these digits)
Innervated by Median
Pronator Teres Flexor Carpi radialis Palmaris longus Flexor digitorum superficialis Flexor Digitorum profundis Palmar Surface of Digits 1,2, 3, and half of 4 (as well as distal dorsal) Flexor Pollicis Brevis Flexor pollicis Longus (AIS) Pronator Quadratus (AIS) Abductor Pollicis Brevis Opponens Pollicis Lumbracles 1 and 2 (in carpal tunnel)
Innervated by posterior interosseous
(from radial nerve) Extensor Carpi Ulnaris Extensor Digiti Minimi Extensor Digitorum Abductor Pollicis longus Extensor Pollicis Longus Extensor pollicis brevis Extensor indicis
Innervated by Radial nerve
Triceps brachii Anconeus Extensor Carpi Ulnaris (PIS) Extensor Digiti Minimi (PIS) Brachioradialis Extensor Carpi radialis longus Extensor Carpi radialis brevis Extensor Digitorum (PIS) Abductor Pollicis longus (PIS) Extensor pollicis brevis (PIS) Supinator Extensor pollicis longus (PIS) Extensor indicis (PIS)
Innervated by Anterior interosseous Nerve
Flexor Pollicis longus
Pronator Quadratus
Cubital Fossa
Borders: Pronator Teres, Brachioradialis Covering: Bicipital aponeurosis Superficial: Cephalic vein and Basilic vein meet at Median cubital vein Contents: Terminal part of brachial artery (turns into ulnar and radial) Tendon of biceps brachii MEdian Nerve Radial Nerve
Subclavian Artery
Becomes: Axillary Artery once past first rib
Branches: (VIT C and sometimes D, ITSA Deep Supreme)
Vertebral Artery
Internal Thoracic Artery
Thyrocervical
Costocervical
Dorsal Scapular
Thyrocervical artery
From: Subclavian Branches: ITSA Inferior Thyroid Transverse Cervical Suprascapular Ascending
Costocervical Artery
From: subclavian
Branches: Deep Supreme
Deep Cervical
Supreme Thoracic
Brachial Artery
From: Axillary artery (Past Teres Major)
Branches: Deep Brachii
Becomes (USRD): Radial artery (Deep) and Ulnar artery (superficial) in cubital fossa
Brachial Artery
From: Axillary artery (Past Teres Major)
Branches: Deep Brachii
Becomes (UDRs): Radial artery (Deep) and Ulnar artery (superficial) in cubital fossa
Ulnar artery
From: Brachial artery
Branches: Common interosseous artery
Common interosseous artery
From: Ulnar artery
Becomes: Anterior interosseous artery and Posterior interosseous artery
1/2 LOAF
Muscles innervated by the Median Nerve. 1/2 of Extensor Digitorum Profundis 1st and 2nd lumbricals. Opponens pollicis Adductor pollicis brevis Flexor pollicis brevis
Buccopharyngeal fascia
Description: Continuous with Carotid sheath and pretracheal
Contains: Esophagus/pharynx
Prevertebral Fascia
Contents: Ant. and Post. Scalene muscles, back muscles, prevertebral muscle
Retropharyngeal space
Between buccopharyngeal space and prevertebral fascia.
Importance: If perforated, can cause exchange of fluids with abdominal cavity.
Infrahyoid muscles
Omohyoid
Sternohyoid
Thyrohyoid
Innervation: Ansa Cervicalis (C1-3)
Suprahyoid muscles
Digastric Mylohyoid Geniohyoid Stylohyoid Hyoglossus
Suprahyoid muscles
Digastric Mylohyoid Geniohyoid Stylohyoid Hyoglossus
Sternothyroid
Innervation: Ansa Cervicalis
Origin: Manubrium, 1st rib
Attachment: Thyroid
Action: Depress larynx, thyroid
Thyrohyoid
Innervation: C1 via CNXII
Origin: Thyroid
Attachment: Hyoid (greater horn)
Action: Depress larynx, hyoid bone. Elevate thyroid cartilage.
Digastric
Innervation: A: nerve to mylohyoid P: facial nerve Origin: A: Mandible P: Mastoid notch, temporal bone Attachment: hyoid Action: Elevates hyoid, lowers mandible.
Mylohyoid
Innervation: Nerve to mylohyoid (V)
Origin: Mandible
Attachment: hyoid
Action:Elevate hyoid bone, depress mandible
Geniohyoid
Innervation: Hypoglossal (XII)
Origin: Mandible (inf. genial tubercle)
Attachment: Hyoid
Action: Elevates hyoid, depress mandible
Stylohyoid
Innervation: Facial nerve VII
Origin: Styloid process
Attachment: Greater horn of hyoid
Action: Elevates hyoid bone
Hyoglossus
Innervation: Hypoglossal (XII)
Origin: Hyoid bone
Attachment: Inferior Tongue
Action: Depress and retract tongue
Branches from External Carotid
SALFORMS Superior thyroid artery Ascending pharyngeal Lingual Facial Occipital posterior auRicular Maxillary Superior temporal
Facial nerve (CNVII) Brances
Ten Zombies Bit My Cat Temporal Zygomatic Buccal Mandibular Cervical
Occipitalis
Innervation: Post auricular (VII)
Origin: Nuchal line/mastoid
Attachment: epicranial aponeurosis
Action: Moves scalp backwards
Frontalis
Innervation: Temporal nerve (VII)
Origin: Epicranial aponeurosis
Attachment: Skin in frontal region
Action: wrinkles forehead skin, elevates eyebrows
Orbicularis oculi
Innervation: Facial nerve (VII)
Origin: Lacrimal bone
Attachment: Skin around orbit
Action: closes eyelids
Orbicularis oris
Innervation: Zygomatic, buccal, and mandibular branches (VII)
Origin: Maxilla
Attachment: Skin around lips
Action: Compress, contraction, and portrusion of lips
Buccinator
Innervation: Buccal n. (VII)
Origin: Maxilla
Attachment: Angle of mouth
Action: Compress cheeck
Temporalis
Innervation: Deep temporal, V3
Origin: Temporal fossa
Attachment: Coronoid process
Action: Elevates mandibule
Masseter
Innervation: Mandibular nerve (V3)
Origin: Zygomatic arch
Attachment: Ramus, coronoid process
Action: elevates and protrudes jaw
Lateral pterygoid
Innervation: V3 Origin: S: greater wing of sphenoid I: lateral pterygoid Attachment: capsule of temporomandibular joint Action: Protrude mandible, side to side grinding
Lateral pterygoid
Innervation: V3 Origin: S: greater wing of sphenoid I: lateral pterygoid Attachment: capsule of temporomandibular joint Action: Opens jaw
Nerves that supply the face
Motor: CN V, VII
Sensory: CN V
Parasympathetic: VII, IX
Branches of trigeminal
Ophthalmic (V1)
Maxillary (V2)
Mandibular (V3)
Muscles of mastication:
Masseter
Temporalis
Lateral pterygoid
Medial Pterygoid
Sensory branches of V2
Infraorbital nerve
Sensory branches of V3
BAIL Buccal (ant) Auriculotemporal (travels with superficial temporal artery) Inferior alveolar (becomes mental) Lingual
Inferior alveolar nerve
From: V3 (mandibular)
Gives off: Mental nerve
Branches of the Maxillary artery
From: External carotid
Important branches: Middle Meningeal, Inferior alveolar(turns into mental), Inferior orbital
Branches of Facial
From: External corotid
SAL
Superior labial
Ascending palatine
Lateral nasal
Branches of Maxillary
From: External carotid SPD Sphenopalatine Pharyngeal Descending palatine
Kiesselbach’s area
Anastomosis between the following arteries leads to nose bleeds:
Sphenopalatine(Maxillary) Superior Labial (Facial) Anterior Ethmoidal (Int. Carotid)