Muscles of the hand: Hypothenar group

Muscles of the hand: Hypothenar groupAnatomy, function, blood supply and innervation of the muscles of the hand
~ 3 min

In this pdf-note, we’ll start with the borders of the upper limb:

  • The anterior border is the deltopectoral groove

  • The posterior border is the posterior deltoid groove

    Borders of the upper limb
    Borders of the upper limb
    Borders of the upper limb
    Borders of the upper limb

    Within the upper limb, there are many regions:

  • Deltoid region (regio deltoidea)

  • Axillary region (regio axillaris)

  • Anterior region of the arm (regio brachialis anterior)

  • Posterior region of the arm (regio brachialis posterior)

  • Anterior region of the elbow (regio cubitalis anterior)

  • Posterior region of the elbow (regio cubitalis posterior)

  • Anterior region of the forearm (regio antero brachialis anterior)

  • Posterior region of the forearm (regio anterobrachialis posterior)

  • Anterior region of the wrist (regio carpalis anterior)

  • Posterior region of the wrist (regio carpalis posterior)

  • Palmar region of the hand (regio palmaris manus)

  • Dorsal region of the hand (regio dorsalis manus)

    Regions of the upper limb
    Regions of the upper limb
    Regions of the upper limb
    Regions of the upper limb

    Within these areas, the muscles of the upper limb are located.

    These include:

  • Pectoral girdle muscles

  • Muscles of the free part of upper limb

    The muscles of the free part of the upper limb are divided into:

  • Arm muscles

  • Forearm muscles

  • Hand muscles

    There are three groups among the muscles of the hand:

  • The thenar eminence muscles (thenar) is the lateral group

  • The hypothenar eminence muscles (hypothenar) form the medial group

  • The middle muscle group

    The muscles of the hypothenar eminence include:

  • Palmaris brevis muscle (m. palmaris brevis)

    Palmaris brevis muscle (m. palmaris brevis)
    Palmaris brevis muscle (m. palmaris brevis)
    Palmaris brevis muscle
    (m. palmaris brevis)

    Origin: flexor retinaculum, palmar aponeurosis

    Insertion: inserts into the skin of the medial border of the hand

    Function: wrinkles the skin of the hypothenar eminence

    Innervation: ulnar nerve (C8-Th1)

    Blood supply: ulnar artery

  • Abductor digiti minimi muscle (m. abductor digiti minimi)

    Abductor digiti minimi muscle (m. abductor digiti minimi)
    Abductor digiti minimi muscle (m. abductor digiti minimi)
    Abductor digiti minimi muscle
    (m. abductor digiti minimi)

    Origin: pisiform bone, flexor retinaculum

    Insertion: base of the proximal phalanx of the little finger

    Function: abducts the little finger

    Innervation: ulnar nerve (C7-Th1)

    Blood supply: deep palmar branch of the ulnar artery

  • Opponens digiti minimi muscle (m. opponens digiti minimi)

    Opponens digiti minimi muscle (m. opponens digiti minimi)
    Opponens digiti minimi muscle (m. opponens digiti minimi)
    Opponens digiti minimi muscle
    (m. opponens digiti minimi)

    Origin: flexor retinaculum, hook of the hamate

    Insertion: medial border and anterior surface of the 5th metacarpal

    Function: opposes the little finger to the thumb

    Innervation: ulnar nerve (C8-Th1)

    Blood supply: deep palmar branch of the ulnar artery

  • Flexor digiti minimi brevis muscle (m. flexor digiti minimi brevis)

Flexor digiti minimi brevis muscle (m. flexor digiti minimi brevis)
Flexor digiti minimi brevis muscle (m. flexor digiti minimi brevis)
Flexor digiti minimi brevis muscle
(m. flexor digiti minimi brevis)

Origin: flexor retinaculum, hook of the hamate

Insertion: palmar surface of the proximal phalanx of the little finger

Function: flexes the little finger

Innervation: ulnar nerve (C8-Th1)

Blood supply: deep palmar branch of the ulnar artery

Dictionary

Muscles of the hand

Deltoid region
regio deltoidea
Axillary region
regio axillaris
Anterior region of the arm
regio brachialis anterior
Posterior region of the arm
regio brachialis posterior
Anterior region of the elbow
regio cubitalis anterior
Posterior region of the elbow
regio cubitalis posterior
Anterior region of the forearm
regio anterobrachialis anterior
Posterior region of the forearm
regio anterobrachialis posterior
Anterior region of the wrist
regio carpalis anterior
Posterior region of the wrist
regio carpalis posterior
Palmar region of the hand
regio palmaris manus
Dorsal region of the hand
regio dorsalis manus
Thenar eminence
thenar
Hypothenar eminence
hypothenar
Palmaris brevis muscle
m. palmaris brevis
Abductor digiti minimi muscle
m. abductor digiti minimi
Opponens digiti minimi muscle
m. opponens digiti minimi
Flexor digiti minimi brevis muscle
m. flexor digiti minimi brevis
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