Origin and Insertion Flashcards
Origin and insertion of temporalis ?
Origin:Temporal fossa
Insertion: Coronoid fossa, ramus of the mandible
What are the functions of the temporalis?
Elevation of mandible
Retraction of mandible (sec)
Origin and insertion of the masseter?
Origin: Inferior margin of both zygomatic bone and zygomatic arch of the temporal bone
Actions of masseter?
Elevation of mandible
Protraction of mandible (sec)
Retraction of mandible (sec)
What nerve innervates the masseter?
Trigeminal nerve (mandibular division)
Origin and insertion of lateral pterygoid?
Origin: Sphenoid bone
Insertion: Mandible and the temperomandibular joint (TMJ)
What are the actions of the lateral pterygoid?
Protraction of mandible
Contralateral deviation of mandible (sec)
Which nerves innervates the lateral pterygoid?
Trigeminal nerve (CN V)
Origin and insertion of the medial pterygoid?
Origin: Sphenoid bone
Deep head –> process of the sphenoid, the palatine bone, and the tuberosity of the maxilla
Superifical head –> The palatine bone and the maxilla Insertion: Internal surface of the mandible
The muscles of the scalp are innervated by which nerve?
Facial nerve (CN VII)
The muscles of facial expression are innervated by which nerve?
Facial nerve (CN VII)
The muscles of mastication are innervated by which nerve?
Trigeminal nerve (CN V)
What are the 3 muscles of the scalp?
Occipitofrontalis, temperoparietalis, auricularis
What are the muscles of the eye?
Orbicularis oculi, levator palpebrae superior, corrugator supercilii
What are the muscles of the nose?
Procerus, nasalis, depressor septi nasi
What are the muscles of the mouth?
Levator labii superior alaeque nasi, levator labii superioris, zygomaticus minor, zygomaticus major, levator anguli oris, risorius, depressor anguli oris, depressor labii inferioris, mentalis, buccinator, orbicularis oris
What are the muscles of mastication?
Temporalis,
lateral pterygoid,
medial pterygoid,
masseter
Origin and insertion of the anterior scaleni?
Origin: Anterior tubercles of processus transversi C3-C6
Insertion: 1st rib
Actions of anterior scalene?
Flexion of neck
Lateral flexion of neck
Elevation of 1st rib
Contralateral rotation of neck (sec)
Origin and insertion of middle scalene?
Origin: Posterior tubercles of the processus transversi of C2-C7
Insertion: 1st rib
What are the function of the middle scalene?
Lateral flexion of neck,
flexion of neck,
elevation of the 1st rib
Origin and insertion of the posterior scaleni?
Origin: Posterior tubercle of processus transversi C5-C7
Insertion: 2nd rib
Actions of the posterior scaleni?
Lateral flexion of neck
Elevation of the 2nd rib
Origin and insertion of posterior digastric?
Origin: Mastoid notch of temporal bone
Insertion: Hyoid bone
Origin and insertion of anterior digastric?
Origin: Inner surface of the inferior border of mandible, diagstric fossa
Insertion: Hyoid bone
Actions of the digastric?
Elevation of hyoid,
depression of mandible at TMJ,
retraction of mandible at TMJ
Which nerves innervate the digastric muscle?
Anterior belly CN V -
Trigeminal Posterior belly -
CN VII -
facial nerve
Origin and insertion of the geniohyoid?
Origin: Inferior mental spine of the mandible
Insertion: Anterior surface of hyoid
What is the actions of geniohyoid?
Elevation of hyoid,
depresses the mandible (sec)
Which nerve innervates the geniohyoid?
Hypoglossal nerve (CN XII)
Origin and insertion of the levator scapula?
Origin: Posterior tubercle of processus transveri C1-C4
Insertion: Medial border of scapula, angulus superior, root of spine of scapula
What are the origin and insertion of Longus capitis?
Origin: Anterior tubercles of processus transversi C3-C5
Insertion: Inferior surface of occiput
What are the actions of longus capitis?
Flexion of neck,
Lateral flexion of neck
What are the origin and insertion of the Longus Colli?
Origin: Anterior body of processus transversi C3-T3
Insertion: Processus transversi and anterior bodies of C1-C6, anterior arch of atlas
Actions of longus colli?
Flexion of neck,
Lateral flexion of neck (sec),
Contralateral rotation of neck (sec)
Origin and insertion of middle scaleni?
Origin: Posterior tubercles of PT C2-C7
Insertion: 1st rib
Actions of middle scaleni?
Lateral flexion of neck,
Flexion of neck,
Elevation of 1st rib
What are the origin and insertion of Mylohyoid?
Origin: Inner surface of mandible
Insertion: Anterior surface of body of hyoid
What are the actions of Mylohyoid?
Elevation of hyoid,
Depresses the mandible (sec)
What nerve innervates the mylohyoid?
Trigeminal nerve (CN V)
What is the origin and insertion of obliquus capitis inferior?
Origin: Processus spinosi C2
Insertion: Processus transversi Atlas
Actions of levator scapula?
Elevatoin of scapula, Extension of neck, Lateral flexion of neck, Ipsilateral rotation neck (sec), Downward rotation scapula (sec), Retraction scapula (sec)
What are the origin and insertion of the Obliquus capitis superior?
O: TP of Atlas
I: Occiput, between superior and inferior nucheal lines
Origin and insertion of inferior belly of omohyoid?
O: Superior border of scapula
I: Clavicula
Origin and insertion of superior belly of omohyoid
O: Clavicle
I: Hyoid, inferior surface
Origin and insertion of posterior scaleni?
O: Posterior tubercle of TP of C5-C7
I: 2nd rib
What are the origin and insertion of the rectus capitis anterior?
O: Anterior surface of the TP of Atlas
I: Inferior surface of the basilar part of occiput
What are the actions of rectus capitis anterior?
Flexion of the head
What are the origin and insertion of rectus capitis lateralis?
O: Superior surface of the TP of Atlas
I: Inferior surface of the jugular process of the occiput
Action of rectus capitis lateralis?
Lateral flexion of the head
What are the origin and insertion of Rectus capitis posterior major?
O: PS of Axis (C2)
I: Lateral 1/2 of inferior nuchal line of occiput
Actions of Rectus capitis posterior major?
Extension of head,
Lateral flexion of head (sec)
Ipsilateral rotation (sec)
Extends and ipsilaterally rotates the atlas (sec)
What are the origin and insertion of Rectus capitis posterior minor?
O: Posterior tubercle of atlas
I: Medial 1/2 of inferior nuchal line of occiput
Actions of rectus capitis posterior minor?
Extension of head
What are the origin and insertion of splenius capitis?
O: Nuchal ligaments C3-C6, PS of C7-T4
I: Mastoid process, Lateral 1/3 of superior nuchal line of the occiput
Actions of splenius capitis?
Extension of neck,
Lateral flexion of neck,
Ipsilateral rotation of neck
Origin and insertion of splenius cervicis?
O: PS of T3-T6
I: Posterior tubercles of PT of C1-C3
Actions of splenius cervicis?
Extension of neck,
Lateral flexion of neck,
Ipsilateral rotation of neck
Origin and insertion of sternocleidomastoideus?
O: Sternal head –> Manibrium of sternum Clavicular head –> Medial 1/3 of clavicula
I: Processus mastoideus Lateral 1/2 of superior nuchal line of occiput
Actions of sternocleidomastoideus?
Flexion of neck, Lateral flexion of neck, Contralateral rotation of neck, Extension of head (sec) Elevation of sternum and clavicula (sec)
Origin and insertion of sternohyoid?
O: Posterior surface of manibrium of sternum and medial clavicula
I: Inferior surface of body of hyoid
Actions of sternohyoid?
Depresssion of the hyoid
Origin and insertion of Sternothyroid?
O: Posterior surface of both manibrium of sternum and cartilage of 1st rib
I: Lamina of thyroid cartilage
Actions of sternothyroid?
Depesses the thyroid cartilage
Origin and insertion of Stylohyoid?
O: Posterior surface of processus styloid of temporal bone
I: Hyoid
Actions of stylohyoid?
Elevation of hyoid
Origin and insertion of Thyrohyoid?
O: Lamina of thyroid cartilage
I: Inferior surface fo hyoid
Actions of the thyrohyoid?
Depresses hyoid,
Elevates the thyroid cartilage (sec)
Origin and insertion of trapezius?
O: Upper –> Occiput medial 1/3 of superior nuchal line, external occipital protuberance, PS of C7
Middle –> PS of T1-T5
Lower: –> PS of T6-T12
I: Upper –> Lateral 1/3 of clavicula and acromion of scapula
Middle –> Acromion process and spina scapula
Lower: Tubercle at the root of the spine of scapula
Actions of trapezius?
Lateral flexion of neck + head, Extension of neck + head Contralateral rotation of neck + head, Elevation of scapula, Retraction of scapula, Depresses the scapula, Upward rotation of scapula (sec) Extension of trunk (sec)
Origin and insertion of biceps brachii?
O: Long head –> Supraglenoid tubercle of scapula
Short head –> Processus coracoideus of scapula
I: Tuberositas radii, bicipital aponeurosis
Actions of biceps brachii?
Flexion of elbow, Supination, Flexion of shoulder, Abduction of shoulder (sec), Adduction of shoulder (sec)
Origin and insertion of brachialis?
O: Distal 1/2 of anterior shaft of humerus
I: Tuberositas ulnae, processus cornoideus of ulna
Actions of brachialis?
Flexion of elbow
Origin and insertion of coracobrachialis?
O: Processus coracoideus
I: Middle 1/3 of medial shaft of humerus
Actions of coracobrachialis
Flexion of shoulder,
Adduction of shoulder
Origin and insertion of deltoideus?
O: Lateral 1/3 of clavicula, acromion process, spina scapula
I: Deltoid tuberostiy of humerus
Actions of deltoideus?
Abduction shoulder, Flexion shoulder, Extension shoulder, Medial rotation shoulder, Lateral rotation shoulder, Downwward rotation of scapula (sec) Ipsilateral rotation of trunk (sec) Contralateral rotation of trunk (sec)
What is the origin and insertion of Infraspinatus?
O: Medial 2/3 of the infraspinous fossa of the scapula
Actions of infraspinatus?
Lateral rotation shoulder
Origin and insertion of subscapularis?
O: Subscapular fossa of the scapula
I: Lesser tubercle of the humerus
Actions of subscapularis?
Medial rotation
Origin and insertion of supraspinatus?
O: Medial 2/3 of supraspinous fossa of scapula
I: Superior facet of tuberculum major of humerus
Actions of supraspinatus?
Abduction of shoulder
Origin and insertion of teres major?
O: Inferior 1/3 of the dorsal surface of latearal border of scapula
I: Medial lip of bicipital groove of humerus
Actions of teres major?
Medial rotation of shoulder,
Adduction of shoulder,
Extension of shoulder,
Upwards rotation of scapula (sec)
Origin and insertion of teres minor?
O: Superior 2/3 of dorsal surface of lateral border of scapula
I: Tuberculum major, inferior facet
Origin and insertion of triceps brachii?
O: Long head –> Infraglenoid tubercle of scapula
Lateral head –> Proximal 1/2 of the posterior shaft of humerus
Medial head –> Distal 1/2 of the posterior shaft of humerus
I: Olecranon